1
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Oda S, Masui Y, Omura S, Imamura Y, Takeuchi Y, Hosoya M. Addition Reaction of Alcohol to Isocyanate Catalyzed by Copper Present in Tap Water: Robust Manufacturing Process of Naldemedine Tosylate. Org Process Res Dev 2022. [DOI: 10.1021/acs.oprd.2c00187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shinichi Oda
- API R&D Laboratory, CMC R&D Division, Shionogi and Co., Ltd., 1-3, Kuise Terajima 2-chome, Amagasaki, Hyogo 660-0813, Japan
| | - Yoshiyuki Masui
- API R&D Laboratory, CMC R&D Division, Shionogi and Co., Ltd., 1-3, Kuise Terajima 2-chome, Amagasaki, Hyogo 660-0813, Japan
| | - Sohei Omura
- API R&D Laboratory, CMC R&D Division, Shionogi and Co., Ltd., 1-3, Kuise Terajima 2-chome, Amagasaki, Hyogo 660-0813, Japan
| | - Yoshiaki Imamura
- API R&D Laboratory, CMC R&D Division, Shionogi and Co., Ltd., 1-3, Kuise Terajima 2-chome, Amagasaki, Hyogo 660-0813, Japan
| | - Yoshiyuki Takeuchi
- API R&D Laboratory, CMC R&D Division, Shionogi and Co., Ltd., 1-3, Kuise Terajima 2-chome, Amagasaki, Hyogo 660-0813, Japan
| | - Masahiro Hosoya
- API R&D Laboratory, CMC R&D Division, Shionogi and Co., Ltd., 1-3, Kuise Terajima 2-chome, Amagasaki, Hyogo 660-0813, Japan
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2
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Zhang Y, Ge X, Lu H, Li G. Catalytic Decarboxylative C-N Formation to Generate Alkyl, Alkenyl, and Aryl Amines. Angew Chem Int Ed Engl 2021; 60:1845-1852. [PMID: 33026167 DOI: 10.1002/anie.202010974] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Indexed: 12/24/2022]
Abstract
Transition-metal-catalyzed sp2 C-N bond formation is a reliable method for the synthesis of aryl amines. Catalytic sp3 C-N formation reactions have been reported occasionally, and methods that can realize both sp2 and sp3 C-N formation are relatively unexplored. Herein, we address this challenge with a method of catalytic decarboxylative C-N formation that proceeds through a cascade carboxylic acid activation, acyl azide formation, Curtius rearrangement and nucleophilic addition reaction. The reaction uses naturally abundant organic carboxylic acids as carbon sources, readily prepared azidoformates as the nitrogen sources, and 4-dimethylaminopyridine (DMAP) and Cu(OAc)2 as catalysts with as low as 0.1 mol % loading, providing protected alkyl, alkenyl and aryl amines in high yields with gaseous N2 and CO2 as the only byproducts. Examples are demonstrated of the late-stage functionalization of natural products and drug molecules, stereospecific synthesis of useful α-chiral alkyl amines, and rapid construction of different ureas and primary amines.
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Affiliation(s)
- Yipin Zhang
- Institute of Chemistry and BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Xia Ge
- Institute of Chemistry and BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Hongjian Lu
- Institute of Chemistry and BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China
| | - Guigen Li
- Institute of Chemistry and BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, China.,Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX, 79409-1061, USA
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3
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Zhang Y, Ge X, Lu H, Li G. Catalytic Decarboxylative C−N Formation to Generate Alkyl, Alkenyl, and Aryl Amines. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202010974] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Yipin Zhang
- Institute of Chemistry and BioMedical Sciences Jiangsu Key Laboratory of Advanced Organic Materials School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China
| | - Xia Ge
- Institute of Chemistry and BioMedical Sciences Jiangsu Key Laboratory of Advanced Organic Materials School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China
| | - Hongjian Lu
- Institute of Chemistry and BioMedical Sciences Jiangsu Key Laboratory of Advanced Organic Materials School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China
| | - Guigen Li
- Institute of Chemistry and BioMedical Sciences Jiangsu Key Laboratory of Advanced Organic Materials School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093 China
- Department of Chemistry and Biochemistry Texas Tech University Lubbock TX 79409-1061 USA
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4
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Luo W, Ip FCF, Fu G, Cheung K, Tian Y, Hu Y, Sinha A, Cheng EYL, Wu X, Bustos V, Greengard P, Li YM, Sinha SC, Ip NY. A Pentacyclic Triterpene from Ligustrum lucidum Targets γ-Secretase. ACS Chem Neurosci 2020; 11:2827-2835. [PMID: 32786303 DOI: 10.1021/acschemneuro.0c00389] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Amyloid-beta peptides generated by β-secretase- and γ-secretase-mediated successive cleavage of amyloid precursor protein are believed to play a causative role in Alzheimer's disease. Thus, reducing amyloid-beta generation by modulating γ-secretase remains a promising approach for Alzheimer's disease therapeutic development. Here, we screened fruit extracts of Ligustrum lucidum Ait. (Oleaceae) and identified active fractions that increase the C-terminal fragment of amyloid precursor protein and reduce amyloid-beta production in a neuronal cell line. These fractions contain a mixture of two isomeric pentacyclic triterpene natural products, 3-O-cis- or 3-O-trans-p-coumaroyl maslinic acid (OCMA), in different ratios. We further demonstrated that trans-OCMA specifically inhibits γ-secretase and decreases amyloid-beta levels without influencing cleavage of Notch. By using photoactivatable probes targeting the subsites residing in the γ-secretase active site, we demonstrated that trans-OCMA selectively affects the S1 subsite of the active site in this protease. Treatment of Alzheimer's disease transgenic model mice with trans-OCMA or an analogous carbamate derivative of a related pentacyclic triterpene natural product, oleanolic acid, rescued the impairment of synaptic plasticity. This work indicates that the naturally occurring compound trans-OCMA and its analogues could become a promising class of small molecules for Alzheimer's disease treatment.
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Affiliation(s)
- Wenjie Luo
- Laboratory of Molecular and Cellular Neuroscience, The Rockefeller University, New York, New York 10065, United States
| | - Fanny C. F. Ip
- Division of Life Science, State Key Laboratory of Molecular Neuroscience, and Molecular Neuroscience Center, The Hong Kong University of Science and Technology, Clear Water Bay Road, Kowloon, Hong Kong, China
- Hong Kong Center for Neurodegenerative Diseases, Hong Kong Science Park, Hong Kong, China
- Guangdong Provincial Key Laboratory of Brain Science, Disease and Drug Development, Shenzhen−Hong Kong Institute of Brain Science, HKUST Shenzhen Research Institute, Shenzhen, Guangdong, China 518057
| | - Guangmiao Fu
- Division of Life Science, State Key Laboratory of Molecular Neuroscience, and Molecular Neuroscience Center, The Hong Kong University of Science and Technology, Clear Water Bay Road, Kowloon, Hong Kong, China
| | - Kit Cheung
- Division of Life Science, State Key Laboratory of Molecular Neuroscience, and Molecular Neuroscience Center, The Hong Kong University of Science and Technology, Clear Water Bay Road, Kowloon, Hong Kong, China
| | - Yuan Tian
- Laboratory of Molecular and Cellular Neuroscience, The Rockefeller University, New York, New York 10065, United States
| | - Yueqing Hu
- Division of Life Science, State Key Laboratory of Molecular Neuroscience, and Molecular Neuroscience Center, The Hong Kong University of Science and Technology, Clear Water Bay Road, Kowloon, Hong Kong, China
| | - Anjana Sinha
- Laboratory of Molecular and Cellular Neuroscience, The Rockefeller University, New York, New York 10065, United States
| | - Elaine Y. L. Cheng
- Division of Life Science, State Key Laboratory of Molecular Neuroscience, and Molecular Neuroscience Center, The Hong Kong University of Science and Technology, Clear Water Bay Road, Kowloon, Hong Kong, China
| | - Xianzhong Wu
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Victor Bustos
- Laboratory of Molecular and Cellular Neuroscience, The Rockefeller University, New York, New York 10065, United States
| | - Paul Greengard
- Laboratory of Molecular and Cellular Neuroscience, The Rockefeller University, New York, New York 10065, United States
| | - Yue-Ming Li
- Chemical Biology Program, Memorial Sloan Kettering Cancer Center, New York, New York 10065, United States
| | - Subhash C. Sinha
- Laboratory of Molecular and Cellular Neuroscience, The Rockefeller University, New York, New York 10065, United States
| | - Nancy Y. Ip
- Division of Life Science, State Key Laboratory of Molecular Neuroscience, and Molecular Neuroscience Center, The Hong Kong University of Science and Technology, Clear Water Bay Road, Kowloon, Hong Kong, China
- Hong Kong Center for Neurodegenerative Diseases, Hong Kong Science Park, Hong Kong, China
- Guangdong Provincial Key Laboratory of Brain Science, Disease and Drug Development, Shenzhen−Hong Kong Institute of Brain Science, HKUST Shenzhen Research Institute, Shenzhen, Guangdong, China 518057
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5
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Agirre M, Henrion S, Rivilla I, Miranda JI, Cossío FP, Carboni B, Villalgordo JM, Carreaux F. 1,3-Dioxa-[3,3]-sigmatropic Oxo-Rearrangement of Substituted Allylic Carbamates: Scope and Mechanistic Studies. J Org Chem 2018; 83:14861-14881. [PMID: 30457341 DOI: 10.1021/acs.joc.8b01320] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An unexpected 1,3-dioxa-[3,3]-sigmatropic rearrangement during the treatment of aryl- and alkenyl-substituted allylic alcohols with activated isocyanates is reported. The reorganization of bonds is highly dependent on the electron density of the aromatic ring and the nature of isocyanate used. This metal-free tandem reaction from branched allyl alcohols initiated by a carbamoylation reaction and followed by a sigmatropic rearrangement thus offers a new access to ( E)-cinnamyl and conjugated ( E, E)-diene carbamates, such as N-acyl and N-sulfonyl derivatives. A computational study was conducted in order to rationalize this phenomenon, and a rearrangement progress kinetic analysis was performed.
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Affiliation(s)
- Maddalen Agirre
- Departamento de Química Orgánica I and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Facultad de Química , Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU) and Donostia International Physics Center (DIPC) , P° Manuel Lardizabal 3 , 20018 San Sebastián/Donostia , Spain
| | - Sylvain Henrion
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226 , 263, avenue du Général Leclerc, Campus de Beaulieu , F-35000 Rennes , France
| | - Ivan Rivilla
- Departamento de Química Orgánica I and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Facultad de Química , Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU) and Donostia International Physics Center (DIPC) , P° Manuel Lardizabal 3 , 20018 San Sebastián/Donostia , Spain
| | - José I Miranda
- SGIker NMR Facility , Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU) , Avda. Tolosa 72 , E-20018 San Sebastián/Donostia , Spain
| | - Fernando P Cossío
- Departamento de Química Orgánica I and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Facultad de Química , Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU) and Donostia International Physics Center (DIPC) , P° Manuel Lardizabal 3 , 20018 San Sebastián/Donostia , Spain
| | - Bertrand Carboni
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226 , 263, avenue du Général Leclerc, Campus de Beaulieu , F-35000 Rennes , France
| | - José M Villalgordo
- VillaPharma Research, Parque Tecnológico de Fuente Alamo , Ctra. El Estrecho-Lobosillo, Av. Azul , 30320 Murcia , Spain
| | - François Carreaux
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226 , 263, avenue du Général Leclerc, Campus de Beaulieu , F-35000 Rennes , France
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6
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Lu YJ, Lai YH, Lin YY, Wang YC, Liang PH. 2- O- N-Benzylcarbamoyl as a Protecting Group To Promote β-Selective Glycosylation and Its Applications in the Stereoselective Synthesis of Oligosaccharides. J Org Chem 2018; 83:3688-3701. [PMID: 29512381 DOI: 10.1021/acs.joc.8b00047] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This study examines the utility of the N-benzylcarbamoyl (BnCar) protecting group in glycosylation reactions of the parent O-2 protected carbohydrate donor. It was found that the BnCar group imparted exclusively β-selectivity with primary and secondary alcohols. A mechanistic study revealed the activated intermediate to be the glycosyl triflate in a skew conformation, which results in β-selective glycosylation via an SN2-like pathway. The BnCar group can be readily cleaved using tetrabutylammonium nitrite, without affecting ester and ether protecting groups. Taken together, these results show BnCar to be useful for the synthesis of complex oligosaccharides, an undertaking that requires delicate chemical differentiation of various protecting groups.
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Affiliation(s)
- Yin-Jen Lu
- School of Pharmacy, College of Medicine , National Taiwan University , Taipei 100 , Taiwan
| | - Yen-Hsun Lai
- School of Pharmacy, College of Medicine , National Taiwan University , Taipei 100 , Taiwan
| | - You-Yu Lin
- School of Pharmacy, College of Medicine , National Taiwan University , Taipei 100 , Taiwan
| | - Yi-Chi Wang
- School of Pharmacy, College of Medicine , National Taiwan University , Taipei 100 , Taiwan
| | - Pi-Hui Liang
- School of Pharmacy, College of Medicine , National Taiwan University , Taipei 100 , Taiwan
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7
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Piperidines from acid-catalysed cyclisations: Pitfalls, solutions and a new ring contraction to pyrrolidines. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.07.058] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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8
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Takubo K, Furutsu K, Ide T, Nemoto H, Ueda Y, Tsujikawa K, Ikawa T, Yoshimitsu T, Akai S. Diversity Oriented Synthesis of Allocolchicinoids with Fluoro and/or Oxygen Substituent(s) on the C-Ring from a Single Common Intermediate. European J Org Chem 2016. [DOI: 10.1002/ejoc.201501624] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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9
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Borgström B, Huang X, Pošta M, Hegardt C, Oredsson S, Strand D. Synthetic modification of salinomycin: selective O-acylation and biological evaluation. Chem Commun (Camb) 2014; 49:9944-6. [PMID: 24037337 DOI: 10.1039/c3cc45983g] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Salinomycin has found renewed interest as an agent for prevention of cancer recurrence through selectively targeting cancer stem cells. Strategies for generation of improved salinomycin analogs by individual modification of its hydroxyl groups are presented. An evaluation of the dose-response effects of the resulting library on breast cancer cell lines shows that acylation of the C20 hydroxyl can be used to improve IC50 values down to one fifth that of salinomycin.
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Affiliation(s)
- Björn Borgström
- Centre for Analysis and Synthesis, Department of Chemistry, Lund University, Box 124, 221 00 Lund, Sweden.
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10
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Ishida N, Nakanishi Y, Murakami M. Reactivity Change of Cyclobutanols towards Isocyanates: Rhodium FavorsC-Carbamoylation overO-Carbamoylation. Angew Chem Int Ed Engl 2013; 52:11875-8. [DOI: 10.1002/anie.201306343] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2013] [Indexed: 11/09/2022]
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11
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Ishida N, Nakanishi Y, Murakami M. Reactivity Change of Cyclobutanols towards Isocyanates: Rhodium FavorsC-Carbamoylation overO-Carbamoylation. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201306343] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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12
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Akai S, Tanaka R, Hoshi H, Sato KI. Selective Deprotection Method of N-Phenylcarbamoyl Group. J Org Chem 2013; 78:8802-8. [DOI: 10.1021/jo4007128] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shoji Akai
- Department of Material and Life Chemistry, Faculty
of Engineering, Kanagawa University, Rokkakubashi,
Kanagawa-ku, Yokohama 221-8686, Japan
| | - Rika Tanaka
- Department of Material and Life Chemistry, Faculty
of Engineering, Kanagawa University, Rokkakubashi,
Kanagawa-ku, Yokohama 221-8686, Japan
| | - Hidekazu Hoshi
- Department of Material and Life Chemistry, Faculty
of Engineering, Kanagawa University, Rokkakubashi,
Kanagawa-ku, Yokohama 221-8686, Japan
| | - Ken-ichi Sato
- Department of Material and Life Chemistry, Faculty
of Engineering, Kanagawa University, Rokkakubashi,
Kanagawa-ku, Yokohama 221-8686, Japan
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13
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Moreno-Sanz G, Duranti A, Melzig L, Fiorelli C, Ruda GF, Colombano G, Mestichelli P, Sanchini S, Tontini A, Mor M, Bandiera T, Scarpelli R, Tarzia G, Piomelli D. Synthesis and structure-activity relationship studies of O-biphenyl-3-yl carbamates as peripherally restricted fatty acid amide hydrolase inhibitors. J Med Chem 2013; 56:5917-30. [PMID: 23822179 DOI: 10.1021/jm4007017] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The peripherally restricted fatty acid amide hydrolase (FAAH) inhibitor URB937 (3, cyclohexylcarbamic acid 3'-carbamoyl-6-hydroxybiphenyl-3-yl ester) is extruded from the brain and spinal cord by the Abcg2 efflux transporter. Despite its inability to enter the central nervous system (CNS), 3 exerts profound antinociceptive effects in mice and rats, which result from the inhibition of FAAH in peripheral tissues and the consequent enhancement of anandamide signaling at CB1 cannabinoid receptors localized on sensory nerve endings. In the present study, we examined the structure-activity relationships (SAR) for the biphenyl region of compound 3, focusing on the carbamoyl and hydroxyl groups in the distal and proximal phenyl rings. Our SAR studies generated a new series of peripherally restricted FAAH inhibitors and identified compound 35 (cyclohexylcarbamic acid 3'-carbamoyl-5-hydroxybiphenyl-3-yl ester) as the most potent brain-impermeant FAAH inhibitor disclosed to date.
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Affiliation(s)
- Guillermo Moreno-Sanz
- Drug Discovery and Development, Fondazione Istituto Italiano di Tecnologia , via Morego 30, I-16163 Genova, Italy
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14
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Yoganathan S, Miller SJ. N-Methylimidazole-catalyzed synthesis of carbamates from hydroxamic acids via the Lossen rearrangement. Org Lett 2013; 15:602-5. [PMID: 23327543 DOI: 10.1021/ol303424b] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
An efficient, one-pot, N-methylimidazole (NMI) accelerated synthesis of aromatic and aliphatic carbamates via the Lossen rearrangement is reported. NMI is a catalyst for the conversion of isocyanate intermediates to the carbamates. Moreover, the utility of arylsulfonyl chloride in combination with NMI minimizes the formation of often-observed hydroxamate-isocyanate dimers during the sequence. Under the present conditions, lowering of temperatures is also possible, enabling a mild protocol.
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Affiliation(s)
- Sabesan Yoganathan
- Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520, USA
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15
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He Z, Zajdlik A, St Denis JD, Assem N, Yudin AK. Boroalkyl group migration provides a versatile entry into α-aminoboronic acid derivatives. J Am Chem Soc 2012; 134:9926-9. [PMID: 22662871 DOI: 10.1021/ja304173d] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
A reaction exemplifying migration of boron-substituted carbon is described. We show that α-boroalkyl groups of transient boroalkyl acyl azide intermediates readily migrate from carbon to nitrogen. This process allows access to a new class of stable molecules, α-boryl isocyanates, from α-borylcarboxylic acid precursors. The methodology facilitates synthesis of a wide range of α-aminoboronic acid derivatives, including α,α-disubstituted analogues.
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Affiliation(s)
- Zhi He
- Davenport Research Laboratories, Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, Canada M5S 3H6
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16
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17
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Kurono N, Ohtsuga K, Wakabayashi M, Kondo T, Ooka H, Ohkuma T. Kinetic Resolution of Racemic α-tert-Alkyl-α-hydroxy Esters by Enantiomer-Selective Carbamoylation. J Org Chem 2011; 76:10312-8. [DOI: 10.1021/jo201940w] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nobuhito Kurono
- Division
of Chemical Process Engineering, Faculty of
Engineering, Hokkaido University, Sapporo,
Hokkaido 060-8628, Japan
| | - Kentaro Ohtsuga
- Division
of Chemical Process Engineering, Faculty of
Engineering, Hokkaido University, Sapporo,
Hokkaido 060-8628, Japan
| | - Masanori Wakabayashi
- Division
of Chemical Process Engineering, Faculty of
Engineering, Hokkaido University, Sapporo,
Hokkaido 060-8628, Japan
| | - Tadahiro Kondo
- Division
of Chemical Process Engineering, Faculty of
Engineering, Hokkaido University, Sapporo,
Hokkaido 060-8628, Japan
| | - Hirohito Ooka
- Division
of Chemical Process Engineering, Faculty of
Engineering, Hokkaido University, Sapporo,
Hokkaido 060-8628, Japan
| | - Takeshi Ohkuma
- Division
of Chemical Process Engineering, Faculty of
Engineering, Hokkaido University, Sapporo,
Hokkaido 060-8628, Japan
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18
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Heuckendorff M, Pedersen CM, Bols M. The influence of neighboring group participation on the hydrolysis of 2-O-substituted methyl glucopyranosides. Org Lett 2011; 13:5956-9. [PMID: 22007683 DOI: 10.1021/ol202308y] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Does neighboring group participation actually enhance the reactivity of the anomeric center when the participating group is inherently disarming? To investigate the influence of the neighboring group effect from a 2-O protective group on acidic glycoside hydrolysis, 10 methyl glucosides having different protective groups on O2 have been synthesized and a clear trend between anomeric configuration, participation of the protective group, and the rate of hydrolysis could be observed.
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19
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Shang J, Guo X, Shi F, Ma Y, Zhou F, Deng Y. N-substituted carbamates syntheses with alkyl carbamates as carbonyl source over Ni-promoted Fe3O4 catalyst. J Catal 2011. [DOI: 10.1016/j.jcat.2011.01.030] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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20
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Ratier M, Khatmi D, Duboudin JG. Synthesis and Flash-pyrolysis of Organotin -Substituted Carbamates and Oxalates. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bscb.19911000606] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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21
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Abstract
The total synthesis of (+)-iriciniastatin A (psymberin) is reported in 19 steps and 6% overall yield. Key reactions include a highly convergent enolsilane-oxocarbenium ion union to generate the C8-C25 fragment and a late-stage coupling of a hemiaminal and acid chloride to complete the synthesis.
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Affiliation(s)
- Michael T Crimmins
- Kenan and Caudill Laboratories of Chemistry, University of North Carolina at Chapel Hill, North Carolina 27599, USA.
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22
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Arbour M, Roy S, Godbout C, Spino C. Stereoselective Synthesis of (+)-Euphococcinine and (−)-Adaline. J Org Chem 2009; 74:3806-14. [DOI: 10.1021/jo9001992] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mélissa Arbour
- Université de Sherbrooke, Département de Chimie, 2500 Boulevard Université, Sherbrooke, Québec, Canada J1K 2R1
| | - Stéphanie Roy
- Université de Sherbrooke, Département de Chimie, 2500 Boulevard Université, Sherbrooke, Québec, Canada J1K 2R1
| | - Cédrickx Godbout
- Université de Sherbrooke, Département de Chimie, 2500 Boulevard Université, Sherbrooke, Québec, Canada J1K 2R1
| | - Claude Spino
- Université de Sherbrooke, Département de Chimie, 2500 Boulevard Université, Sherbrooke, Québec, Canada J1K 2R1
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23
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Kurono N, Kondo T, Wakabayashi M, Ooka H, Inoue T, Tachikawa H, Ohkuma T. Enantiomer-selective carbamoylation of racemic alpha-hydroxy gamma-lactones with chiral Cu(II) Catalysts: an example of a highly active Lewis acid catalyzed reaction. Chem Asian J 2008; 3:1289-97. [PMID: 18461583 DOI: 10.1002/asia.200700420] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Enantiomer-selective carbamoylation of racemic alpha-hydroxy gamma-lactones with half equivalents of isocyanates in the presence of chiral Cu(II) catalysts was studied. Among a series of catalyst bearing chiral bis(oxazoline) (box) and pyridine(bisoxazoline) ligands, [Cu(tBu-box)]X(2) [X=OSO(2)CF(3) (3 a), SbF(6) (3 b)] showed the highest enantioselectivity in the reaction of pantolactone (1 a). Use of n-C(3)H(7)NCO, a small alkyl isocyanate, in CH(2)Cl(2) solution was important to achieve a high level of enantiomer selection. The tBu-box-Cu(II) catalyst efficiently differentiated two enantiomers of beta-substituted alpha-hydroxy gamma-lactones under the optimized reaction conditions, resulting in a stereoselectivity factor (s=k(fast)/k(slow)) of up to 209. Furthermore, this catalyst is highly active, so that the carbamoylation can be conducted with a substrate-to-catalyst molar ratio of 2000-3000. A catalytic cycle of this reaction is also proposed.
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Affiliation(s)
- Nobuhito Kurono
- Division of Chemical Process Engineering, Graduate School of Engineering, Hokkaido University, Sapporo, Japan
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24
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Heggelund A, Undheim K. Preparation of cyclic 2′,3′-carbamate derivatives of erythromycin macrolide antibiotics. Bioorg Med Chem 2007; 15:3266-77. [PMID: 17337343 DOI: 10.1016/j.bmc.2007.02.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2006] [Revised: 02/06/2007] [Accepted: 02/13/2007] [Indexed: 10/23/2022]
Abstract
Tricarbonylation of clarithromycin has been effected in a one-pot reaction with phosgene. The 11,12-diol moiety was closed into a cyclic carbonate, while the dimethylamino alcohol of the desosamine sugar was cyclised with loss of a methyl group to form a cyclic 2',3'-carbamate. The 4'' hydroxyl group in clarithromycin was converted into a chloroformate group and subsequently to an allyl carbonate which on Pd-catalysis furnished a novel N-demethylclarithromycin 2',3'-carbamate-11,12-carbonate. Hydrolytic removal of the cladinose sugar and a subsequent oxidation furnished the corresponding ketolide. The 11,12-cyclic carbonate moiety was cleaved by sodium azide to the 10,11-anhydro-9-ketone. 11-N-Arylated cyclic 11,12:2',3'-dicarbamate derivatives were prepared in a copper(I) chloride aided reaction between aryl isocyanates and 10,11-anhydro 9-ketones. The products are novel N-arylated-N'-demethylated 11,12:2',3'-dicarbamate ketolides derived from clarithromycin.
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Affiliation(s)
- Audun Heggelund
- Department of Chemistry, University of Oslo, N-0315 Oslo, Norway
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25
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Rao RVR, Tantry SJ, Babu VVS. Practical and Efficient Synthesis of Orthogonally Protected α‐2,3‐Diaminopropionic Acid (2,3‐Dap), 2,4‐Diaminobutanoic Acid (2,4‐Dab), and their N‐Methylated Derivatives. SYNTHETIC COMMUN 2007. [DOI: 10.1080/00397910600772827] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- R. V. Ramana Rao
- a Department of Studies in Chemistry , Central College Campus, Bangalore University , Bangalore, India
| | - Subramanyam J. Tantry
- a Department of Studies in Chemistry , Central College Campus, Bangalore University , Bangalore, India
| | - Vommina V. Suresh Babu
- a Department of Studies in Chemistry , Central College Campus, Bangalore University , Bangalore, India
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26
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Teng H, Jiang Z, Wu L, Su J, Feng X, Qiu G, Liang S, Hu X. Facile Way to Synthesize Nα‐Boc‐Nβ‐Cbz‐2,3‐ Diaminopropionic Acid Derivatives via 5‐Oxazolidinone. SYNTHETIC COMMUN 2006. [DOI: 10.1080/00397910600948039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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27
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Microwave Assisted Alcoholysis of Isocyanates Derived from Nα-[(9-fluorenylmethyl)oxy]carbonyl Amino Acids: Synthesis of N-Fmoc-N1-Z-/Boc-/Alloc-/Bsmoc-gem-diamines. Int J Pept Res Ther 2006. [DOI: 10.1007/s10989-006-9046-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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28
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Neffe AT, Bilang M, Meyer B. Synthesis and optimization of peptidomimetics as HIV entry inhibitors against the receptor protein CD4 using STD NMR and ligand docking. Org Biomol Chem 2006; 4:3259-67. [PMID: 17036114 DOI: 10.1039/b605380g] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We recently described the design and synthesis of a novel CD4 binding peptidomimetic as a potential HIV entry inhibitor with a KD value of approximately 35 microM and a high proteolytic stability [A. T. Neffe and B. Meyer, Angew. Chem., Int. Ed., 2004, 43, 2937-2940]. Based on saturation transfer difference (STD) NMR analyses and docking studies of peptidomimetics we now report the rational design, synthesis, and binding properties of 11 compounds with improved binding affinity. Surface plasmon resonance (SPR) resulted in a KD = 10 microM for the best peptidomimetic XI, whose binding affinity is confirmed by STD NMR (KD = 9 microM). The STD NMR determined binding epitope of the ligand indicates a very similar binding mode as that of the lead structure. The binding studies provide structure activity relationships and demonstrate the utility of this approach.
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Affiliation(s)
- Axel T Neffe
- Institute for Organic Chemistry, University of Hamburg, Martin Luther King Platz 6, 20146, Hamburg.
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29
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Buser S, Vasella A. 7-Oxanorbornane and Norbornane Mimics of a Distortedβ-D-Mannopyranoside: Synthesis and Evaluation asβ-Mannosidase Inhibitors. Helv Chim Acta 2005. [DOI: 10.1002/hlca.200590255] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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30
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Englund EA, Gopi HN, Appella DH. An efficient synthesis of a probe for protein function: 2,3-diaminopropionic acid with orthogonal protecting groups. Org Lett 2005; 6:213-5. [PMID: 14723531 DOI: 10.1021/ol0361599] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] An efficient and cost-effective synthesis of N(alpha)-Boc2-N(beta)-Cbz-2,3-diaminopropionic acid is reported. The synthesis starts from commercially available N(alpha)-Boc-Asp(OBn)-OH and employs a Curtius rearrangement to establish the beta-nitrogen. Proper protection of the alpha-nitrogen is essential for the success of the Curtius rearrangement.
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Affiliation(s)
- Ethan A Englund
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, USA
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31
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Kruse HP, Heydenreich M, Engst W, Schilde U, Kroll J. The identification of 1,3-oxazolidine-2-thiones and 1,3-thiazolidine-2-thiones from the reaction of glucose with benzyl isothiocyanate. Carbohydr Res 2005; 340:203-10. [PMID: 15639240 DOI: 10.1016/j.carres.2004.10.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2003] [Revised: 09/03/2004] [Accepted: 10/17/2004] [Indexed: 11/18/2022]
Abstract
The structure of interaction products resulting from the reaction of unmodified glucose with benzyl isothiocyanate is reported. Prior to their identification, the main products of this reaction were isolated using solid-phase extraction (SPE) as well as preparative HPLC. They were then identified by NMR and MS as 3-benzyl-4-hydroxy-5-(D-arabino-1,2,3,4-tetrahydroxybutyl)-1,3-oxazolidine-2-thione, 3-benzyl-4-hydroxy-4-hydroxymethyl-5-(D-erythro-1,2,3-trihydroxypropyl)-1,3-oxazolidine-2-thione, N-benzyl-(D-gluco-4,5-dihydroxy-6-hydroxymethyl-tetrahydropyrano)[2,3-b]oxazolidine-2-thione and 3-benzyl-4-(N-benzyl amino)-5-(D-arabino-1,2,3,4-tetrahydroxybutyl)-1,3-thiazolidine-2-thione. The identity of the last compound was secured by X-ray crystal structure data.
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Affiliation(s)
- Hans-P Kruse
- University of Potsdam, Institute of Nutritional Science, Arthur-Scheunert-Allee 114-116, D-14558 Nuthetal, Germany.
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32
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Pokorski JK, Witschi MA, Purnell BL, Appella DH. (S,S)-trans-cyclopentane-constrained peptide nucleic acids. a general backbone modification that improves binding affinity and sequence specificity. J Am Chem Soc 2005; 126:15067-73. [PMID: 15548003 DOI: 10.1021/ja046280q] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Replacing the ethylenediamine portion of aminoethylglycine peptide nucleic acids (aegPNAs) with one or more (S,S)-trans-cyclopentane diamine units significantly increases binding affinity and sequence specificity to complementary DNA, making these modified PNAs ideal for use as nucleic acid probes in genomic analysis. The synthesis and study of this new class of PNAs (tcypPNAs) is described in which trans-cyclopentane diamine has been incorporated into several positions, and in varying number, within PNA backbones of mixed-base sequences.
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Affiliation(s)
- Jonathan K Pokorski
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, USA
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33
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Rouquayrol M, Gaucher B, Greiner J, Aubertin AM, Vierling P, Guedj R. Synthesis and anti-HIV activity of glucose-containing prodrugs derived from saquinavir, indinavir and nelfinavir. Carbohydr Res 2001; 336:161-80. [PMID: 11705466 DOI: 10.1016/s0008-6215(01)00260-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
With the aim at improving the transport of the current HIV protease inhibitors across the intestinal and blood brain barriers and their penetration into the central nervous system, the synthesis of various acyl and carbamatoyl glucose-containing prodrugs derived from saquinavir, indinavir and nelfinavir, their in vitro stability with respect to hydrolysis, and their anti-HIV activity have been investigated. D-Glucose, which is actively transported across these barriers, was connected through its 3-hydroxyl to these antiproteases via a linker. The liberation of the active free drug during the incubation time of the prodrugs with the cells was found to be crucial for HIV inhibition. The labile ester linking of the glucose-containing moiety to the peptidomimetic hydroxyl of saquinavir or to the indinavir C-8 hydroxyl, which is not part of the transition state isostere, is not an obstacle for anti-HIV activity. This is not the case for its stable carbamate linking to the peptidomimetic hydroxyl of saquinavir, indinavir and nelfinavir. The chemical stability with respect to hydrolysis of some of the saquinavir and indinavir prodrugs reported here, the liberation rate of the active free drug and the HIV inhibitory potency are acceptable for an in vivo use of these prodrugs. These glucose-linked ester and carbamate prodrugs display a promising therapeutic potential provided that their bioavailability, penetration into the HIV sanctuaries, and/or the liberation of the active free drug from the carbamate prodrugs are improved. Furthermore, no cytotoxicity was detected for the prodrugs for concentrations as high as 10 or even 100 microM, thus indicating an encouraging therapeutic index.
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Affiliation(s)
- M Rouquayrol
- Laboratoire de Chimie Bio-Organique, UMR 6001 CNRS, Université de Nice Sophia-Antipolis, Parc Valrose, F-06108 Nice, France
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34
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Abstract
The Stemona alkaloid stenine (1), isolated from Stemona tuberosa of physiologically active stemonaceous plants, possesses the structurally novel and unique azepinoindole skeleton (B,C,D-ring system). We have achieved the asymmetric total synthesis of (-)-stenine (1), starting from 1,5-pentanediol (10). The key features are an intramolecular diastereoselective Diels-Alder reaction of the (E,E,E) triene 6, prepared in a convergent fashion from three components--dienyl chloride 7, dithiane 8, and chiral phosphonate 9--and efficient construction of the tricyclic A,B,D-ring system 29 through thermodynamically controlled regioselective enolization of the bicyclic ketone 25. In this article, we describe in detail the highly stereocontrolled total synthesis of (-)-stenine (1). These results should be useful for the asymmetric total synthesis of another, more complex. molecule: tuberostemonine (2), the synthesis of which has never been reported.
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Affiliation(s)
- Y Morimoto
- Department of Chemistry, Graduate School of Science, Osaka City University, Osaka, Japan.
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35
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Abstract
[reaction: see text] The amino sugar side chain (2) from C-1027Chr was synthesized in 12 steps from mannose. The key reactions are an internal displacement by nitrogen to introduce the cis amino group at C-4 and the methylation of an enolate at C-5.
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Affiliation(s)
- M F Semmelhack
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA.
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36
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Ishii K, Sugiyama S, Morishita K. A Three-Step Synthesis of Optically ActiveÅ@5-Halomethyl-2-oxazolidinones; Asymmetric Desymmetrization of Prochiral 1,3-Dihalo-2-propyl Carbamates. HETEROCYCLES 2001. [DOI: 10.3987/com-00-9114] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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37
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Isolation and structure elucidation of coleophomones A and B, novel inhibitors of bacterial cell wall transglycosylase. Tetrahedron Lett 2000. [DOI: 10.1016/s0040-4039(00)01532-x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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38
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Recent advances in the medicinal chemistry of taxoid anticancer agents. ADVANCES IN MEDICINAL CHEMISTRY 1999. [DOI: 10.1016/s1067-5698(99)80004-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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39
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Tanaka T, Mikamiyama H, Maeda K, Iwata C, In Y, Ishida T. Total Synthesis of (−)-Macrocarpal C. Stereoselective Coupling Reaction with a Novel Hexasubstituted Benzene Cr(CO)3Complex as a Biomimetic Chiral Benzyl Cation Equivalent. J Org Chem 1998. [DOI: 10.1021/jo981413+] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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40
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DeNinno MP, Eller C, Etienne JB. Carbohydrate modifications in the spirostane cellobioside cholesterol absorption inhibitor series. Bioorg Med Chem Lett 1998; 8:1623-8. [PMID: 9873402 DOI: 10.1016/s0960-894x(98)00288-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cholesterol absorption inhibition remains an attractive approach for the treatment of hypercholesterolemia. We have continued our SAR development in the spirostanyl cellobioside class of agents seeking a greater understanding of the role carbamoyl substitution has on the potency in this series. In this regard, a series of differentially substituted carbamate analogs were made with and without deoxygenations. From this study, it was determined that the minimal requirements for optimal potency was a lone carbamate at C4" and deoxygenation at the C6" position.
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Affiliation(s)
- M P DeNinno
- Central Research Division, Pfizer Inc., Groton, CT 06340, USA
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41
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McMinn DL, Greenberg MM. Postsynthetic Conjugation of Protected Oligonucleotides Containing 3‘-Alkylamines. J Am Chem Soc 1998. [DOI: 10.1021/ja9740834] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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42
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Urban FJ, Breitenbach R, Buzon RA, Daniels PJ, Dunn PJ, Gut S, Lehner RS, Orrill SL, Watson HA. Process Research and Large-Scale Synthesis of 4‘‘,6‘‘-Bis((2-fluorophenyl)carbamoyl)hecogenyl β-O-Cellobioside: A Potent Cholesterol Absorption Inhibitor. Org Process Res Dev 1998. [DOI: 10.1021/op9702206] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Frank J. Urban
- Pfizer Inc., Central Research Division, Process Research and Development Department, Eastern Point Road, Groton, Connecticut 06340, and Ramsgate Road, Sandwich, Kent CT13 9NJ, UK
| | - Ralph Breitenbach
- Pfizer Inc., Central Research Division, Process Research and Development Department, Eastern Point Road, Groton, Connecticut 06340, and Ramsgate Road, Sandwich, Kent CT13 9NJ, UK
| | - Richard A. Buzon
- Pfizer Inc., Central Research Division, Process Research and Development Department, Eastern Point Road, Groton, Connecticut 06340, and Ramsgate Road, Sandwich, Kent CT13 9NJ, UK
| | - Peter J. Daniels
- Pfizer Inc., Central Research Division, Process Research and Development Department, Eastern Point Road, Groton, Connecticut 06340, and Ramsgate Road, Sandwich, Kent CT13 9NJ, UK
| | - Peter J. Dunn
- Pfizer Inc., Central Research Division, Process Research and Development Department, Eastern Point Road, Groton, Connecticut 06340, and Ramsgate Road, Sandwich, Kent CT13 9NJ, UK
| | - Sally Gut
- Pfizer Inc., Central Research Division, Process Research and Development Department, Eastern Point Road, Groton, Connecticut 06340, and Ramsgate Road, Sandwich, Kent CT13 9NJ, UK
| | - Richard S. Lehner
- Pfizer Inc., Central Research Division, Process Research and Development Department, Eastern Point Road, Groton, Connecticut 06340, and Ramsgate Road, Sandwich, Kent CT13 9NJ, UK
| | - Susan L. Orrill
- Pfizer Inc., Central Research Division, Process Research and Development Department, Eastern Point Road, Groton, Connecticut 06340, and Ramsgate Road, Sandwich, Kent CT13 9NJ, UK
| | - Harry A. Watson
- Pfizer Inc., Central Research Division, Process Research and Development Department, Eastern Point Road, Groton, Connecticut 06340, and Ramsgate Road, Sandwich, Kent CT13 9NJ, UK
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43
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Maunier V, Boullanger P, Lafont D, Chevalier Y. Synthesis and surface-active properties of amphiphilic 6-aminocarbonyl derivatives of d-glucose. Carbohydr Res 1997. [DOI: 10.1016/s0008-6215(96)00336-9] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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44
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Ojima I, Slater JC, Michaud E, Kuduk SD, Bounaud PY, Vrignaud P, Bissery MC, Veith JM, Pera P, Bernacki RJ. Syntheses and structure-activity relationships of the second-generation antitumor taxoids: exceptional activity against drug-resistant cancer cells. J Med Chem 1996; 39:3889-96. [PMID: 8831755 DOI: 10.1021/jm9604080] [Citation(s) in RCA: 142] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A series of new 3'-(2-methyl-1-propenyl) and 3'-(2-methylpropyl) taxoids with modifications at C-10 was synthesized by means of the beta-lactam synthon method using 10-modified 7-(triethylsilyl)-10-deacetylbaccatin III derivatives. The new taxoids thus synthesized show excellent cytotoxicity against human ovarian (A121), non-small-cell lung (A549), colon (HT-29), and breast (MCF-7) cancer cell lines. All but one of these new taxoids possess better activity than paclitaxel and docetaxel in the same assay, i.e., the IC50 values of almost all the taxoids are in the subnanomolar level. It is found that a variety of modifications at C-10 is tolerated for the activity against normal cancer cell lines, but the activity against a drug-resistant human breast cancer cell line expressing MDR phenotype (MCF7-R) is highly dependent on the structure of the C-10 modifier. A number of the new taxoids exhibit remarkable activity (IC50 = 2.1-9.1 nM) against MCF7-R. Among these, three new taxoids, SB-T-1213 (4a), SB-T-1214 (4b), and SB-T-1102 (5a), are found to be exceptionally potent, possessing 2 orders of magnitude better activity than paclitaxel and docetaxel. The observed exceptional activity of these taxoids may well be ascribed to an effective inhibition of P-glycoprotein binding by the modified C-10 moieties. The new taxoid SB-T-1213 (4a) shows an excellent activity (T/C = 0% at 12.4 and 7.7 mg/kg/dose, log10 cell kill = 2.3 and 2.0, respectively) against B16 melanoma in B6D2F1 mice via intravenous administration.
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Affiliation(s)
- I Ojima
- Department of Chemistry, State University of New York at Stony Brook 11794-3400, USA
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45
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Ratier M, Khatmi D, Duboudin JG. New organotin catalysts in urethane and polyurethane technology. Appl Organomet Chem 1992. [DOI: 10.1002/aoc.590060308] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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46
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47
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