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Schaumann A, Hammar C, Alsleben S, Schulz M, Grün A, Lankes E, Tietze A, Koch A, Hernáiz Driever P, Thomale UW. Neurosurgical treatment of pediatric brain tumors - results from a single center multidisciplinary setup. Childs Nerv Syst 2024; 40:381-393. [PMID: 37730915 PMCID: PMC10837233 DOI: 10.1007/s00381-023-06123-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Accepted: 08/09/2023] [Indexed: 09/22/2023]
Abstract
OBJECTIVE The challenge of pediatric brain tumor surgery is given due to a relative low prevalence but high heterogeneity in age, localization, and pathology. Improvements of long-term overall survival rates were achieved during the past decades stressing the importance of a multidisciplinary decision process guided by a national treatment protocol. We reviewed the entire spectrum of pediatric brain tumor surgeries from the perspective of an interdisciplinary pediatric neuro-oncology center in Germany. METHODS Every patient who underwent brain tumor surgery from January 2010 to June 2017 in our Pediatric Neurosurgery department was retrospectively included and evaluated regarding the course of treatment. Perioperative data such as tumor localization, timing of surgery, extent of resection, neuropathological diagnosis, transfusion rates, oncologic and radiation therapy, and neurological follow-up including morbidity and mortality were evaluated. RESULTS Two hundred ninety-three pediatric brain tumor patients were applicable (age: 8.28 ± 5.62 years, 1.22:1.0 m:f). A total of 531 tumor surgical interventions was performed within these patients (457 tumor resections, 74 tumor biopsies; mean interventions per patient 1.8 ± 1.2). Due to a critical neurologic status, 32 operations (6%) were performed on the day of admission. In 65.2% of all cases, tumor were approached supratentorially. Most frequent diagnoses of the cases were glial tumors (47.8%) and embryonal tumors (17.6%). Preoperative planned extent of resection was achieved in 92.7%. Pre- and postoperative neurologic deficits resolved completely in 30.7%, whereas symptom regressed in 28.6% of surgical interventions. New postoperative neurologic deficit was observed in 10.7%, which resolved or improved in 80% of these cases during 30 days. The mortality rate was 1%. CONCLUSION We outlined the center perspective of a specialized pediatric neuro-oncological center describing the heterogeneous distribution of cases regarding age-related prevalence, tumor localization, and biology, which requires a high multidisciplinary expertise. The study contributes to define challenges in treating pediatric brain tumors and to develop quality indicators for pediatric neuro-oncological surgery. We assume that an adequate volume load of patients within a interdisciplinary infrastructure is warranted to aim for effective treatment and decent quality of life for the majority of long-term surviving pediatric tumor patients.
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Affiliation(s)
- A Schaumann
- Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Pediatric Neurosurgery, Augustenburger Platz 1, 13353, Berlin, Germany
| | - C Hammar
- Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Pediatric Neurosurgery, Augustenburger Platz 1, 13353, Berlin, Germany
| | - S Alsleben
- Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Pediatric Neurosurgery, Augustenburger Platz 1, 13353, Berlin, Germany
| | - M Schulz
- Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Pediatric Neurosurgery, Augustenburger Platz 1, 13353, Berlin, Germany
| | - A Grün
- Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department for Radiation Oncology and Radiotherapy, Augustenburger Platz 1, 13353, Berlin, Germany
| | - E Lankes
- Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Pediatric Endocrinology and Diabetes, Augustenburger Platz 1, 13353, Berlin, Germany
| | - A Tietze
- Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institute of Neuroradiology, Augustenburger Platz 1, 13353, Berlin, Germany
| | - Arend Koch
- Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institute of Neuropathology, Berlin, Germany
| | - P Hernáiz Driever
- Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Pediatric Hematology and Oncology, Augustenburger Platz 1, 13353, Berlin, Germany
| | - U-W Thomale
- Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Pediatric Neurosurgery, Augustenburger Platz 1, 13353, Berlin, Germany.
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Keglevich G, Szalai Z, Gulyás KV, Zahár R, Grün A, Für CS. The synthesis of hydroxymethylenebisphosphonic- (dronic-) and acyl-ethoxycarbonyl-methylphosphonate derivatives. PHOSPHORUS SULFUR 2022. [DOI: 10.1080/10426507.2021.2011873] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- György Keglevich
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Zsuzsanna Szalai
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Kinga V. Gulyás
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Róbert Zahár
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Alajos Grün
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Csilla Sepsey Für
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
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Grün A, Szalai Z, Keglevich G. “Greener” Synthesis of Zoledronic Acid from Imidazol-1-yl-acetic Acid and P-Reagents Using Diethyl Carbonate as the Solvent Component. LETT ORG CHEM 2021. [DOI: 10.2174/1570178617999200730203738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The synthesis of a third generation dronic acid, zoledronic acid by the reaction of imidazol-
1-yl-acetic acid with phosphorus trichloride/phosphorous acid in diethyl carbonate (DEC) as a “green”
solvent, and in DEC – methanesulfonic acid (MSA) solvent mixtures is described. The earlier not
“green” and expensive MSA and sulfolane solvents may be replaced by DEC.
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Affiliation(s)
- Alajos Grün
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521 Budapest,Hungary
| | - Zsuzsanna Szalai
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521 Budapest,Hungary
| | - György Keglevich
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521 Budapest,Hungary
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Grün A, Greiner I, Keglevich G. The Synthesis of α-Hydroxy- and α-Chlorophosphonic Acid Derivatives Starting from Benzaldehydes and Phosphorous Acid or Dimethyl Phosphite. CURR ORG CHEM 2019. [DOI: 10.2174/1385272823666190611103102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The addition of phosphorous acid on the C=O group of substituted benzaldehydes
in the presence of hydrochloric acid in water affords a mixture of the corresponding α -
chlorophosphonic acid and α-hydroxyphosphonic acid. The selectivity towards the α-chloro
derivatives may be increased to 92% by the excess of HCl applying forcing conditions. α-
Hydroxyphosphonic acids may be synthesized better in yields of 83-92% by the hydrolysis of
the corresponding dimethyl α-hydroxyphosphonates. α-Chlorophosphonic acids may also be
obtained in yields of 66-79% from α -hydroxyphosphonic esters by reaction with thionyl
chloride followed by hydrolysis. The α -chlorophosphonic acids and esters are useful
intermediates for other phosphonic derivatives.
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Affiliation(s)
- Alajos Grün
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521 Budapest, Hungary
| | | | - György Keglevich
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521 Budapest, Hungary
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Keglevich G, Kiss NZ, Bálint E, Henyecz R, Grün A, Mucsi Z. Microwave irradiation and catalysis in organophosphorus chemistry. PHOSPHORUS SULFUR 2019. [DOI: 10.1080/10426507.2018.1521406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- György Keglevich
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Nóra Zsuzsa Kiss
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Erika Bálint
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Réka Henyecz
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Alajos Grün
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Zoltán Mucsi
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
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Grün A, Rádai Z, Sőregi-Nagy DI, Greiner I, Keglevich G. Rational synthesis of α-hydroxyphosphonic derivatives including dronic acids. PHOSPHORUS SULFUR 2019. [DOI: 10.1080/10426507.2018.1555537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Alajos Grün
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Zita Rádai
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Dávid Illés Sőregi-Nagy
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | | | - György Keglevich
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
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Nagy DI, Grün A, Sinkovicz J, Garadnay S, Greiner I, Keglevich G. A Study on the Synthesis of Risedronic Acid: The Role of an Ionic Liquid Additive. LETT DRUG DES DISCOV 2019. [DOI: 10.2174/1570180815666180626122630] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Background:
The synthesis of high value risedronic acid is not fully resolved, as, for the
time being, the best method based on the preparation from 3-pyridylcarboxylic acid by reaction
with phosphorus trichloride in methanesulfonic acid gives risedronic acid in a good yield, but in an
unpure form.
Methods:
Alternative protocols realizing the synthesis in sulfolane as the solvent and/or in the
presence of suitable IL additive were developed to obtain the target dronic acid in a pure form.
Results & Conclusion:
Using phosphorus trichloride and phosphorous acid in two equivalents
quantities together with 0.6 equivalents of [bmim][BF4] without any solvent, the method afforded
the target dronic acid in a yield of 66% in a pure form.
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Affiliation(s)
- Dávid Illés Nagy
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521 Budapest, Hungary
| | - Alajos Grün
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521 Budapest, Hungary
| | - Júlia Sinkovicz
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521 Budapest, Hungary
| | | | | | - György Keglevich
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521 Budapest, Hungary
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8
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Kisszékelyi P, Nagy S, Tóth B, Zeller B, Hegedűs L, Mátravölgyi B, Grün A, Németh T, Huszthy P, Kupai J. Synthesis and Recovery of Pyridine- and Piperidine-based Camphorsulfonamide Organocatalysts Used for Michael Addition Reaction. Period Polytech Chem Eng 2018. [DOI: 10.3311/ppch.12719] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Two new pyridine-based asymmetric bifunctional organocatalysts containing one or two camphorsulfonamide units were synthesized. Asymmetric Michael addition of pentane-2,4-dione to β-nitrostyrene was catalyzed by these organocatalysts. During our experiments, influence of the solvent and temperature on the yield and enantioselectivity was studied. Using monocamphorsulfonamide derivative the S enantiomer of the corresponding Michael adduct was gained with moderate yield (up to 51 %) and low enantiomeric excess (up to 18 %). Organic solvent nanofiltration was successfully applied for the recovery of these organocatalysts. Furthermore, pyridine camphorsulfonamide was reduced to its piperidine derivative. Using piperidine monosulfonamide derivative racemic Michael adduct was obtained with excellent yield (up to 89 %). Beside its organocatalytic relevance, piperidine monosulfonamide derivative may also possess biological activity.
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Varró G, Pogrányi B, Grün A, Simon A, Hegedűs L, Kádas I. Stereoselective synthesis of trans-dihydronarciclasine derivatives containing a 1,4-benzodioxane moiety. Monatsh Chem 2018; 149:2265-2285. [PMID: 32214482 PMCID: PMC7087796 DOI: 10.1007/s00706-018-2287-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Accepted: 09/03/2018] [Indexed: 10/31/2022]
Abstract
ABSTRACT Some new trans-dihydronarciclasine derivatives containing a 1,4-benzodioxane moiety were stereoselectively synthesised using our feasible and efficient method developed recently. These new phenanthridone alkaloid analogues were obtained in both racemic and optically active forms. High enantioselectivities (up to 99% ee) were achieved by applying (8S,9S)-9-amino(9-deoxy)epiquinine as an organocatalyst. Due to a side reaction, various methoxyphenanthridine regioisomers were also prepared which afforded further synthetic trans-dihydronarciclasine analogues modified in the ring A of the phenanthridone scaffold. GRAPHICAL ABSTRACT
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Affiliation(s)
- Gábor Varró
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budafoki út 8, Budapest, 1111 Hungary
- Gedeon Richter Plc., Gyömrői út 19-21, Budapest, 1103 Hungary
| | - Balázs Pogrányi
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budafoki út 8, Budapest, 1111 Hungary
| | - Alajos Grün
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budafoki út 8, Budapest, 1111 Hungary
| | - András Simon
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Szt. Gellért tér 4, Budapest, 1111 Hungary
| | - László Hegedűs
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budafoki út 8, Budapest, 1111 Hungary
| | - István Kádas
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budafoki út 8, Budapest, 1111 Hungary
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Rapi Z, Nemcsok T, Grün A, Pálvölgyi Á, Samu G, Hessz D, Kubinyi M, Kállay M, Keglevich G, Bakó P. Asymmetric cyclopropanation reactions catalyzed by carbohydrate-based crown ethers. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.04.087] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Niyazi M, Adeberg S, Kaul D, Boulesteix A, Bougatf N, Fleischmann D, Grün A, Krämer A, Rödel C, Eckert F, Paulsen F, Kessel K, Combs S, Oehlke O, Grosu A, Seidlitz A, Lattermann A, Krause M, Baumann M, Guberina M, Stuschke M, Budach V, Belka C, Debus J. OC-0588: Validation of the reRT risk score (RRRS) in glioma patients: A multicenter DKTK/ROG analysis. Radiother Oncol 2018. [DOI: 10.1016/s0167-8140(18)30898-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Nagy DI, Grün A, Lévay K, Garadnay S, Greiner I, Keglevich G. Efficient syntheses of zoledronic acid as an active ingredient of a drug against osteoporosis. SYNTHETIC COMMUN 2018. [DOI: 10.1080/00397911.2017.1410894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Dávid Illés Nagy
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Alajos Grün
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Krisztina Lévay
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | | | | | - György Keglevich
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
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Grün A, Buchner P, Broadley MR, Hawkesford MJ, Thiel G. Identification and expression profiling of Pht1 phosphate transporters in wheat in controlled environments and in the field. Plant Biol (Stuttg) 2018; 20:374-389. [PMID: 29148171 PMCID: PMC5887882 DOI: 10.1111/plb.12668] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Accepted: 11/13/2017] [Indexed: 05/19/2023]
Abstract
Phosphorus (P) is an important macronutrient with critical functions in plants. Phosphate (Pi) transporters, which mediate Pi acquisition and Pi translocation within the plant, are key factors in Pi deficiency responses. However, their relevance for adaptation to long-term Pi limitation under agronomic conditions, particularly in wheat, remains unknown. Here, we describe the identification of the complete Pi transporter gene family (Pht1) in wheat (Triticum aestivum). Gene expression profiles were compared for hydroponic and field-grown plant tissues of wheat at multiple development stages. Cis-element analysis of selected Pht1 promoter regions was performed. A broad range of expression patterns of individual TaPht1 genes was observed in relation to tissue specificity and the nutrient supply in the soil or in liquid culture, as well as an influence of the experimental system. The expression patterns indicate the involvement of specific transporters in Pi uptake, and in Pi transport and remobilisation within the plant, at different growth developmental stages. Specifically, the influence of Pi nutrition indicates a complex regulatory pattern of TaPht1 gene transcript abundances as a response to low Pi availability in different culture systems, correlating with the existence of different cis-acting promoter elements.
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Affiliation(s)
- A. Grün
- Plant Science DepartmentRothamsted ResearchHarpendenUK
| | - P. Buchner
- Plant Science DepartmentRothamsted ResearchHarpendenUK
| | - M. R. Broadley
- Plant and Crop Science DivisionSchool of BiosciencesUniversity of NottinghamLoughboroughUK
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Nemcsok T, Rapi Z, Keglevich G, Grün A, Bakó P. Synthesis of d-mannitol-based crown ethers and their application as catalyst in asymmetric phase transfer reactions. Chirality 2017; 30:407-419. [PMID: 29283193 DOI: 10.1002/chir.22800] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Revised: 11/10/2017] [Accepted: 11/22/2017] [Indexed: 11/06/2022]
Abstract
A few new d-mannitol-based monoaza-15-crown-5 type chiral lariat ethers and 18-crown-6 type macrocycles were synthesized. These crown compounds were used as phase transfer catalysts in asymmetric Michael addititons and in a Darzens condensation under mild conditions to afford the corresponding products in a few cases in good to excellent enantioselectivities. In the Michael addition of diethyl acetoxymalonate to trans-chalcone, in the addition of diethyl acetamidomalonate to ß-nitrostyrene, in the reaction of diethyl bromomalonate with benzylidene malononitriles, in the cyclopropanation reaction of diethyl bromomalonate and 2-benzylidene-1,3-indandione, and in the Darzens condensation of α-chloroacetophenone with benzaldehyde, maximum enantioselectivities of 39%, 65%, 99%, 56%, and 62%, respectively, were obtained in the presence of the d-mannitol-based macrocycles as the catalysts.
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Affiliation(s)
- Tamás Nemcsok
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Zsolt Rapi
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - György Keglevich
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Alajos Grün
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Péter Bakó
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
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Abstract
Several new trans-dihydronarciclasine analogues were stereoselectively synthesised by applying our feasible and efficient process developed recently. These new phenanthridone alkaloid derivatives were obtained in both racemic and optically active forms. During their enantioselective syntheses, high selectivities (up to 99% ee) were achieved by using (8S,9S)-9-amino(9-deoxy)epiquinine as an organocatalyst. The modifications, the introduction of ethoxy or methoxy groups, were made in ring A of the phenanthridone scaffold.
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Affiliation(s)
- István Kádas
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics
| | - Gábor Varró
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics
| | - Lenke Mattyasovszky
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics
| | - Alajos Grün
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics
| | - András Simon
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics
| | - László Hegedűs
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics
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Nagy DI, Grün A, Greiner I, Keglevich G. The Role of Phosphorus Trichloride and Phosphorous Acid in the Formation of -Hydroxymethylenebisphosphonic Acids from the Corresponding Carboxylic Acids – A Mechanistic Overview. CURR ORG CHEM 2017. [DOI: 10.2174/1385272821666170417122441] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Dávid Illés Nagy
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521 Budapest, Hungary
| | - Alajos Grün
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521 Budapest, Hungary
| | | | - Gyorgy Keglevich
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521 Budapest, Hungary
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Varró G, Hegedűs L, Simon A, Balogh A, Grün A, Leveles I, Vértessy BG, Kádas I. The First Enantioselective Total Synthesis of (-)-trans-Dihydronarciclasine. J Nat Prod 2017; 80:1909-1917. [PMID: 28581297 DOI: 10.1021/acs.jnatprod.7b00208] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A feasible and enantioselective total synthesis of (-)-trans-dihydronarciclasine [(-)-1], a highly biologically active alkaloid, was devised starting from vanillin (8). The key step of this new synthesis was an asymmetric, organocatalytic Michael addition, in which an optically active nitropentanone [(-)-13] was obtained from a butenone derivative (12). Excellent enantioselectivity (>99% ee) was achieved using the (8S,9S)-9-amino(9-deoxy)epiquinine (16) organocatalyst. The target molecule can be prepared in 13 steps from compound (-)-13. The total synthesis has provided a facile and first access to the ent-form of naturally occurring (+)-trans-dihydronarciclasine, a highly potent cytostatic alkaloid.
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Affiliation(s)
- Gábor Varró
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics , Budafoki út 8, H-1111 Budapest, Hungary
| | - László Hegedűs
- MTA-BME Organic Chemical Technology Research Group, Hungarian Academy of Sciences, Department of Organic Chemistry and Technology, Budapest University of Technology and Economics , Budafoki út 8, H-1111 Budapest, Hungary
| | - András Simon
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics , Szt. Gellért tér 4, H-1111 Budapest, Hungary
| | - Attila Balogh
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics , Budafoki út 8, H-1111 Budapest, Hungary
| | - Alajos Grün
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics , Budafoki út 8, H-1111 Budapest, Hungary
| | - Ibolya Leveles
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences , Magyar tudósok körútja 2, H-1117 Budapest, Hungary
- Department of Applied Biotechnology and Food Science, Budapest University of Technology and Economics , Szt. Gellért tér 4, H-1111 Budapest, Hungary
| | - Beáta G Vértessy
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences , Magyar tudósok körútja 2, H-1117 Budapest, Hungary
- Department of Applied Biotechnology and Food Science, Budapest University of Technology and Economics , Szt. Gellért tér 4, H-1111 Budapest, Hungary
| | - István Kádas
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics , Budafoki út 8, H-1111 Budapest, Hungary
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Abstract
The microwave (MW) technique has become an important tool also in the organophosphorus field of organic chemistry. On the one hand, otherwise reluctant reactions, such as the esterification of P-acids, may be enhanced by the effect of MW, while on the other hand, catalysts may be omitted, or catalyst systems may be simplified on MW irradiation. This later group includes the Kabachnik–Fields reactions, alkylation of active methylene-containing compounds, O-alkylations, deoxygenations, as well as the Hirao reaction. It is also the purpose of this review to elucidate the scope and limitations of the MW tool, to interpret the MW effects, and to model the distribution of local overheatings and their beneficial effect.1 Introduction2 The Esterification of Phosphinic Acids2.1 Synthetic Results2.2 Scope and Limitation of the Application of MWs2.3 Modelling the Distribution of the Local Overheatings and Predicting Their Effect3 The Simplification of Catalytic Systems3.1 Replacement of the Catalyst by MW Irradiation3.1.1 The Kabachnik–Fields Reaction3.1.2 Solid–Liquid Phase Alkylation of Active Methylene-Containing Compounds3.1.3 Solid–Liquid Phase Alkylation of Phosphinic Acids3.1.4 The Deoxygenation of Phosphine Oxides3.2 The Hirao Reaction without Added P-Ligands4 Conclusions
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Nagy DI, Grün A, Garadnay S, Greiner I, Keglevich G. Investigation of the effect of medium in the preparation of alendronate: till now the best synthesis in the presence of an ionic liquid additive. Heteroatom Chem 2017. [DOI: 10.1002/hc.21370] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Dávid Illés Nagy
- Department of Organic Chemistry and Technology; Budapest University of Technology and Economics; Budapest Hungary
| | - Alajos Grün
- Department of Organic Chemistry and Technology; Budapest University of Technology and Economics; Budapest Hungary
| | | | | | - György Keglevich
- Department of Organic Chemistry and Technology; Budapest University of Technology and Economics; Budapest Hungary
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Thieme A, Stromberger C, Ghadjar P, Grün A, Zschaek S, Budach V. PO-0641: A novel voxel based homogeneity index: clinical implications for WBRT. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)31078-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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21
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Rapi Z, Nemcsok T, Pálvölgyi Á, Keglevich G, Grün A, Bakó P. Synthesis of l-threitol-based crown ethers and their application as enantioselective phase transfer catalyst in Michael additions. Chirality 2017; 29:257-272. [PMID: 28429401 DOI: 10.1002/chir.22678] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Revised: 12/05/2016] [Accepted: 12/15/2016] [Indexed: 12/11/2022]
Abstract
A few new l-threitol-based lariat ethers incorporating a monoaza-15-crown-5 unit were synthesized starting from diethyl l-tartrate. These macrocycles were used as phase transfer catalysts in asymmetric Michael addition reactions under mild conditions to afford the adducts in a few cases in good to excellent enantioselectivities. The addition of 2-nitropropane to trans-chalcone, and the reaction of diethyl acetamidomalonate with β-nitrostyrene resulted in the chiral Michael adducts in good enantioselectivities (90% and 95%, respectively). The substituents of chalcone had a significant impact on the yield and enantioselectivity in the reaction of diethyl acetoxymalonate. The highest enantiomeric excess (ee) values (99% ee) were measured in the case of 4-chloro- and 4-methoxychalcone. The phase transfer catalyzed cyclopropanation reaction of chalcone and benzylidene-malononitriles using diethyl bromomalonate as the nucleophile (MIRC reaction) was also developed. The corresponding chiral cyclopropane diesters were obtained in moderate to good (up to 99%) enantioselectivities in the presence of the threitol-based crown ethers.
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Affiliation(s)
- Zsolt Rapi
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Tamás Nemcsok
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Ádám Pálvölgyi
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - György Keglevich
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Alajos Grün
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Péter Bakó
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
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Keglevich G, Kiss NZ, Bálint E, Bagi P, Grün A, Kovács T, Henyecz R, Ábrányi-Balogh P. Milestones in microwave-assisted organophosphorus chemistry. PHOSPHORUS SULFUR 2016. [DOI: 10.1080/10426507.2016.1211657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- György Keglevich
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Nóra Z. Kiss
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Erika Bálint
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Péter Bagi
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Alajos Grün
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Tamara Kovács
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Réka Henyecz
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Péter Ábrányi-Balogh
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
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23
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Nagy DI, Grün A, Garadnay S, Greiner I, Keglevich G. The synthesis of dronic acid derivatives in sulfolane or in the presence of ionic liquids as additives. PHOSPHORUS SULFUR 2016. [DOI: 10.1080/10426507.2016.1217219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- D. I. Nagy
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - A. Grün
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | | | | | - G. Keglevich
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
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24
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Rapi Z, Grün A, Nemcsok T, Hessz D, Kállay M, Kubinyi M, Keglevich G, Bakó P. Crown ether derived from d-glucose as an efficient phase-transfer catalyst for the enantioselective Michael addition of malonates to enones. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.tetasy.2016.08.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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25
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Nagy DI, Grün A, Garadnay S, Greiner I, Keglevich G. Synthesis of Hydroxymethylenebisphosphonic Acid Derivatives in Different Solvents. Molecules 2016; 21:E1046. [PMID: 27529200 PMCID: PMC6273038 DOI: 10.3390/molecules21081046] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 08/02/2016] [Accepted: 08/03/2016] [Indexed: 02/06/2023] Open
Abstract
The syntheses of hydroxymethylenebisphosphonic acid derivatives (dronic acid derivatives) starting from the corresponding substituted acetic acids and P-reagents, mainly phosphorus trichloride and phosphorous acid are surveyed according to the solvents applied. The nature of the solvent is a critical point due to the heterogeneity of the reaction mixtures. This review sheds light on the optimum choice and ratio of the P-reactants, and on the optimum conditions.
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Affiliation(s)
- Dávid Illés Nagy
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521 Budapest, Hungary.
| | - Alajos Grün
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521 Budapest, Hungary.
| | | | | | - György Keglevich
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, 1521 Budapest, Hungary.
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26
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Rapi Z, Grün A, Keglevich G, Stirling A, Bakó P. Synthesis of α-d-galactose-based azacrown ethers and their application as enantioselective catalysts in Michael reactions. NEW J CHEM 2016. [DOI: 10.1039/c6nj02030e] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Crown ethers derived from d-galactose generated good to excellent enantioselectivities in a few Michael reactions under solid–liquid phase transfer conditions.
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Affiliation(s)
- Zsolt Rapi
- Department of Organic Chemistry and Technology
- Budapest University of Technology and Economics
- 1521 Budapest
- Hungary
| | - Alajos Grün
- Department of Organic Chemistry and Technology
- Budapest University of Technology and Economics
- 1521 Budapest
- Hungary
| | - György Keglevich
- Department of Organic Chemistry and Technology
- Budapest University of Technology and Economics
- 1521 Budapest
- Hungary
| | - András Stirling
- Institute of Organic Chemistry
- Research Centre for Natural Sciences
- Hungarian Academy of Sciences
- Budapest
- Hungary
| | - Péter Bakó
- Department of Organic Chemistry and Technology
- Budapest University of Technology and Economics
- 1521 Budapest
- Hungary
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27
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Affiliation(s)
- György Keglevich
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Alajos Grün
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
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28
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Grün A, Austin DR, Cousin SL, Biegert J. Three-wave mixing mediated femtosecond pulse compression in β-barium borate. Opt Lett 2015; 40:4679-4682. [PMID: 26469593 DOI: 10.1364/ol.40.004679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Nonlinear pulse compression mediated by three-wave mixing is demonstrated for ultrashort Ti:sapphire pulses in a type II phase-matched β-barium borate (BBO) crystal using noncollinear geometry. 170 μJ pulses at 800 nm with a pulse duration of 74 fs are compressed at their sum frequency to 32 fs with 55 μJ of pulse energy. Experiments and computer simulations demonstrate the potential of sum-frequency pulse compression to match the group velocities of the interacting waves to crystals that were initially not considered in the context of nonlinear pulse compression.
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29
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Affiliation(s)
- György Keglevich
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Alajos Grün
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
| | - Rita Kovács
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics, Budapest, Hungary
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30
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Bakó P, Rapi Z, Grün A, Nemcsok T, Hegedűs L, Keglevich G. Asymmetric Michael Addition of Malonates to Enones Catalyzed by an α-d-Glucopyranoside-Based Crown Ether. Synlett 2015. [DOI: 10.1055/s-0034-1378723] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Péter Bakó
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics
| | - Zsolt Rapi
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics
| | - Alajos Grün
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics
| | - Tamás Nemcsok
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics
| | - László Hegedűs
- MTA-BME Organic Chemical Technology Research Group, Hungarian Academy of Sciences, Department of Organic Chemistry and Technology, Budapest University of Technology and Economics
| | - György Keglevich
- Department of Organic Chemistry and Technology, Budapest University of Technology and Economics
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31
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Keglevich G, Grün A, Bagi P, Bálint E, Kiss NZ, Kovács R, Jablonkai E, Kovács T, Fogassy E, Greiner I. Environmentally Friendly Chemistry with Organophosphorus Syntheses in Focus. Period Polytech Chem Eng 2015. [DOI: 10.3311/ppch.7317] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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32
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Kovács R, Grün A, Németh O, Garadnay S, Greiner I, Keglevich G. The Synthesis of Pamidronic Derivatives in Different Solvents: An Optimization and a Mechanistic Study. Heteroatom Chem 2014. [DOI: 10.1002/hc.21155] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Rita Kovács
- Department of Organic Chemistry and Technology; Budapest University of Technology and Economics; 1521 Budapest Hungary
| | - Alajos Grün
- Department of Organic Chemistry and Technology; Budapest University of Technology and Economics; 1521 Budapest Hungary
| | - Orsolya Németh
- Department of Organic Chemistry and Technology; Budapest University of Technology and Economics; 1521 Budapest Hungary
| | | | | | - György Keglevich
- Department of Organic Chemistry and Technology; Budapest University of Technology and Economics; 1521 Budapest Hungary
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33
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Grün A, Blastik Z, Drahos L, Keglevich G. Dialkylation of Diethyl Ethoxycarbonylmethylphosphonate under Microwave and Solventless Conditions. Heteroatom Chem 2014. [DOI: 10.1002/hc.21142] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Alajos Grün
- Department of Organic Chemistry and Technology; Budapest University of Technology and Economics; 1521 Budapest Hungary
| | - Zsófia Blastik
- Department of Organic Chemistry and Technology; Budapest University of Technology and Economics; 1521 Budapest Hungary
| | - László Drahos
- Research Centre for Natural Sciences; Hungarian Academy of Sciences; 1525 Budapest Hungary
| | - György Keglevich
- Department of Organic Chemistry and Technology; Budapest University of Technology and Economics; 1521 Budapest Hungary
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34
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Schmitt Y, Chevalier K, Rupp F, Becherer M, Grün A, Rijs AM, Walz F, Breher F, Diller R, Gerhards M, Klopper W. In-depth exploration of the photophysics of a trinuclear palladium complex. Phys Chem Chem Phys 2014; 16:8332-8. [DOI: 10.1039/c4cp00175c] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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36
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37
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Badakhshi H, Grün A, Stromberger C, Budach V, Boehmer D. Oligometastases: the new paradigm and options for radiotherapy. A critical review. Strahlenther Onkol 2013; 189:357-62. [PMID: 23512205 DOI: 10.1007/s00066-013-0326-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Accepted: 02/06/2013] [Indexed: 01/22/2023]
Abstract
Traditional oncology distinguishes between two separate and incommensurable states in the evolution of solid malignancies: the localized disease, which is curable; and the disseminated status, which is per se palliative. Recently, a huge body of evidence suggests a fundamental change in the understanding of cancer, indicating an intermediate state in the trajectory of solid malignancies: the oligometastatic state. The following review will critically analyse existing hypotheses and facts from the basic sciences and try to contextualize it in regard to the clinical evidence available to date. Consecutively, it will try to draw possible clinical consequences for application of radiotherapy in this specific clinical scenario.
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Affiliation(s)
- H Badakhshi
- Department for Radiation Oncology, Charité University Medicine, Augustenburger Platz 1, 13353, Berlin, Germany.
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38
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Grün A, Milen M, Földesi T, Ábrányi-Balogh P, Drahos L, Keglevich G. Microwave-Assisted Amidation of Arylacetic Acids by Reaction with 2-Aryl-ethylamines. SYNTHETIC COMMUN 2013. [DOI: 10.1080/00397911.2011.642925] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Alajos Grün
- a Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary
- b Research Group of the Hungarian Academy of Sciences at the Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary
| | - Mátyás Milen
- c EGIS Pharmaceuticals , Division for Chemical Research , Budapest , Hungary
| | - Tamás Földesi
- a Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary
| | - Péter Ábrányi-Balogh
- a Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary
| | - László Drahos
- d Hungarian Academy of Sciences , Chemical Research Center , Budapest , Hungary
| | - György Keglevich
- a Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary
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Keglevich G, Kovács R, Grün A, Greiner I. Environmentally Friendly Syntheses and Tools. PHOSPHORUS SULFUR 2013. [DOI: 10.1080/10426507.2012.743543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- György Keglevich
- a Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary
| | - Rita Kovács
- a Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary
- b Research Group of the Hungarian Academy of Sciences at the Department of Organic Chemistry and Technology, Budapest University of Technology and Economics , Budapest , Hungary
| | - Alajos Grün
- a Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary
- b Research Group of the Hungarian Academy of Sciences at the Department of Organic Chemistry and Technology, Budapest University of Technology and Economics , Budapest , Hungary
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40
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Keglevich G, Grün A, Bölcskei A, Drahos L, Kraszni M, Balogh GT. Synthesis and Proton Dissociation Properties of Arylphosphonates: A Microwave-Assisted Catalytic Arbuzov Reaction with Aryl Bromides. Heteroatom Chem 2012. [DOI: 10.1002/hc.21053] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- György Keglevich
- Department of Organic Chemistry and Technology; Budapest University of Technology and Economics; 1521 Budapest; Hungary
| | | | - Adrienn Bölcskei
- Department of Organic Chemistry and Technology; Budapest University of Technology and Economics; 1521 Budapest; Hungary
| | - László Drahos
- Hungarian Academy of Sciences; Chemical Research Center; 1525 Budapest; Hungary
| | - Márta Kraszni
- Department of Pharmaceutical Chemistry; Semmelweis University; 1092 Budapest; Hungary
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41
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Grün A, Blastik Z, Drahos L, Keglevich G. Microwave-assisted alkylation of diethyl ethoxycarbonylmethylphosphonate under solventless conditions. Heteroatom Chem 2012. [DOI: 10.1002/hc.21009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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42
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Durá J, Grün A, Bates PK, Teichmann SM, Ergler T, Senftleben A, Pflüger T, Schröter CD, Moshammer R, Ullrich J, Jaroń-Becker A, Becker A, Biegert J. Wavelength Dependence of the Suppressed Ionization of Molecules in Strong Laser Fields. J Phys Chem A 2011; 116:2662-8. [DOI: 10.1021/jp207257j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- J. Durá
- ICFO-Institut de Ciencies Fotoniques, Av. Carl Friedrich Gauss 3, 08860 Castelldefels (Barcelona), Spain
| | - A. Grün
- ICFO-Institut de Ciencies Fotoniques, Av. Carl Friedrich Gauss 3, 08860 Castelldefels (Barcelona), Spain
| | - P. K. Bates
- ICFO-Institut de Ciencies Fotoniques, Av. Carl Friedrich Gauss 3, 08860 Castelldefels (Barcelona), Spain
| | - S. M. Teichmann
- ICFO-Institut de Ciencies Fotoniques, Av. Carl Friedrich Gauss 3, 08860 Castelldefels (Barcelona), Spain
| | - T. Ergler
- ICFO-Institut de Ciencies Fotoniques, Av. Carl Friedrich Gauss 3, 08860 Castelldefels (Barcelona), Spain
| | - A. Senftleben
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - T. Pflüger
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - C. D. Schröter
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - R. Moshammer
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - J. Ullrich
- Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
| | - A. Jaroń-Becker
- JILA and Department of Physics, University of Colorado, UCB 440, Boulder 80309-0440, United States
| | - A. Becker
- JILA and Department of Physics, University of Colorado, UCB 440, Boulder 80309-0440, United States
| | - J. Biegert
- ICFO-Institut de Ciencies Fotoniques, Av. Carl Friedrich Gauss 3, 08860 Castelldefels (Barcelona), Spain
- ICREA-Institucio Catalana de Recerca i Estudis Avançats, 08010 Barcelona, Spain
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43
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Cousin SL, Forget N, Grün A, Bates PK, Austin DR, Biegert J. Few-cycle pulse characterization with an acousto-optic pulse shaper. Opt Lett 2011; 36:2803-2805. [PMID: 21808318 DOI: 10.1364/ol.36.002803] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
An acousto-optic pulse shaper has been used to characterize few-cycle pulses generated in a hollow-core fiber. A grism pair precompensates for the dispersion of the acousto-optic crystal, allowing the full pulse-shaping window to be used for replica generation rather than self-compensation. A 9.4 fs pulse was measured, the shortest ever measured with an acousto-optic pulse shaper, to our knowledge.
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Affiliation(s)
- S L Cousin
- ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain.
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Keglevich G, Grün A, Molnár IG, Greiner I. Phenyl-, benzyl-, and unsymmetrical hydroxy-methylenebisphosphonates as dronic acid ester analogues from α-oxophosphonates by microwave-assisted syntheses. Heteroatom Chem 2011. [DOI: 10.1002/hc.20727] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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45
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Keglevich G, Grün A, Bálint E, Kiss NZ, Kovács R, Molnár IG, Blastik Z, Tóth RV, Fehérvári A, Csontos I. Green Chemical Tools in Organophosphorus Chemistry—Organophosphorus Tools in Green Chemistry. PHOSPHORUS SULFUR 2011. [DOI: 10.1080/10426507.2010.507725] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- György Keglevich
- a Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary
| | - Alajos Grün
- a Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary
- b Research Group for Organic Chemical Technology , Hungarian Academy of Sciences, Department of Organic Chemistry and Technology, Budapest University of Technology and Economics , Budapest , Hungary
| | - Erika Bálint
- a Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary
| | - Nóra Zs. Kiss
- a Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary
| | - Rita Kovács
- a Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary
| | - István G. Molnár
- a Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary
| | - Zsófia Blastik
- a Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary
| | - R. Viola Tóth
- a Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary
| | - András Fehérvári
- a Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary
| | - István Csontos
- a Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary
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46
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Keglevich G, Kiss NZ, Bálint E, Jablonkai E, Grün A, Milen M, Frigyes D, Greiner I. Microwave-Assisted Esterification of Phosphinic Acids by Alcohols, Phenols, and Alkyl Halogenides. PHOSPHORUS SULFUR 2011. [DOI: 10.1080/10426507.2010.499550] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- György Keglevich
- a Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary
| | - Nóra Zs. Kiss
- a Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary
| | - Erika Bálint
- a Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary
| | - Erzsébet Jablonkai
- a Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary
| | - Alajos Grün
- a Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary
| | - Mátyás Milen
- a Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary
| | - Dávid Frigyes
- b Laboratory of Physical Organometallic Chemistry, Institute of Chemistry , Eötvös University , Budapest , Hungary
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47
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Keglevich G, Grün A, Blastik Z, Greiner I. Solid-liquid phase alkylation of P=O-functionalized CH acidic compounds utilizing phase transfer catalysis and microwave irradiation. Heteroatom Chem 2011. [DOI: 10.1002/hc.20673] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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48
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Teschner D, Grün A, Kähn W. Equine endometrial edema – Comparison between Icelandic- and Warmblood Mares. PFERDEHEILKUNDE 2011. [DOI: 10.21836/pem20110319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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49
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Keglevich G, Puskás RE, Grün A, Csontos I, Greiner I. Monitoring the Phosphorylation of Phenol Derivatives with Diethyl Chlorophosphate in Liquid–Liquid and Solid–Liquid Phase by In Situ Fourier Transform Infrared Spectroscopy, Part II. PHOSPHORUS SULFUR 2010. [DOI: 10.1080/10426501003620392] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- György Keglevich
- a Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary
| | - Réka Eszter Puskás
- a Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary
| | - Alajos Grün
- a Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary
- b Research Group of the Hungarian Academy of Sciences at the Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary
| | - István Csontos
- a Department of Organic Chemistry and Technology , Budapest University of Technology and Economics , Budapest , Hungary
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50
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Greiner I, Grün A, Ludányi K, Keglevich G. Solid-liquid two-phase alkylation of tetraethyl methylenebisphosphonate under microwave irradiation. Heteroatom Chem 2010. [DOI: 10.1002/hc.20648] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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