1
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Le A, Lee D. Selectivity between an Alder–ene reaction and a [2 + 2] cycloaddition in the intramolecular reactions of allene-tethered arynes. Org Chem Front 2021. [DOI: 10.1039/d1qo00459j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Substituent-dependent reactivity and selectivity in the intramolecular reactions of arynes tethered with an allene are described.
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Affiliation(s)
- Anh Le
- Department of Chemistry
- University of Illinois at Chicago
- Chicago
- USA
| | - Daesung Lee
- Department of Chemistry
- University of Illinois at Chicago
- Chicago
- USA
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2
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Ding W, Yoshikai N. Cobalt-Catalyzed Intermolecular [2+2] Cycloaddition between Alkynes and Allenes. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201813283] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Wei Ding
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Naohiko Yoshikai
- Division of Chemistry and Biological Chemistry; School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
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3
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Ding W, Yoshikai N. Cobalt-Catalyzed Intermolecular [2+2] Cycloaddition between Alkynes and Allenes. Angew Chem Int Ed Engl 2019; 58:2500-2504. [PMID: 30614605 DOI: 10.1002/anie.201813283] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Revised: 12/26/2018] [Indexed: 12/25/2022]
Abstract
An intermolecular [2+2] cycloaddition reaction between an alkyne and an allene is reported. In the presence of a cobalt(I)/diphosphine catalyst, a near equimolar mixture of the alkyne and allene is converted into a 3-alkylidenecyclobutene derivative in good yield with high regioselectivity. The reaction tolerates a variety of internal alkynes and mono- or disubstituted allenes bearing various functional groups. The reaction is proposed to involve regioselective oxidative cyclization of the alkyne and allene to form a 4-alkylidenecobaltacyclopentene intermediate, with subsequent C-C reductive elimination.
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Affiliation(s)
- Wei Ding
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
| | - Naohiko Yoshikai
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore, 637371, Singapore
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4
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Yin Z, He Y, Chiu P. Application of (4+3) cycloaddition strategies in the synthesis of natural products. Chem Soc Rev 2018; 47:8881-8924. [DOI: 10.1039/c8cs00532j] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
This review summarizes the applications of (4+3) cycloadditions, both classical and formal, in the syntheses of natural products in the last two decades.
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Affiliation(s)
- Zengsheng Yin
- Department of Chemistry
- State Key Laboratory of Synthetic Chemistry
- The University of Hong Kong
- P. R. China
| | - Yun He
- Department of Chemistry
- State Key Laboratory of Synthetic Chemistry
- The University of Hong Kong
- P. R. China
| | - Pauline Chiu
- Department of Chemistry
- State Key Laboratory of Synthetic Chemistry
- The University of Hong Kong
- P. R. China
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5
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Sahu R, Singh V. Cycloaddition of Spiroepoxycyclohexa-2,4-dienones, Radical Cyclization and 1,3-Acyl Shift in Excited State: Aromatics to Sterpuren-4-one. J Org Chem 2017; 82:6268-6278. [PMID: 28552002 DOI: 10.1021/acs.joc.7b00867] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A stereoselective route to sterpuren-4-one from a simple aromatic precursor is presented. Oxidative dearomatization, π4s + π2s cycloaddition of 6,6-spiroepoxycyclohexa-2,4-dienones with ethyl acrylate, radical cyclization and 1,3-acyl shift in excited state are the important aspects of our approach. An interesting effect of a remote substituent on radical cyclization has also been presented.
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Affiliation(s)
- Raghaba Sahu
- Department of Chemistry, Indian Institute of Technology Bombay , Mumbai 400076, India
| | - Vishwakarma Singh
- Department of Chemistry, Indian Institute of Technology Bombay , Mumbai 400076, India
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6
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Yamazaki S, Sugiura H, Ohashi S, Ishizuka K, Saimu R, Mikata Y, Ogawa A. Intramolecular [2 + 2] and [4 + 2] Cycloaddition Reactions of Cinnamylamides of Ethenetricarboxylate in Sequential Processes. J Org Chem 2016; 81:10863-10886. [PMID: 27723343 DOI: 10.1021/acs.joc.6b01947] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Intramolecular [2 + 2] and [4 + 2] cycloaddition reactions of cinnamylamides of ethenetricarboxylate in sequential processes have been studied. Reaction of 1,1-diethyl 2-hydrogen ethenetricarboxylate and trans-cinnamylamines in the presence of EDCI/HOBt/Et3N led to pyrrolidine products in one pot, via intramolecular [2 + 2], [4 + 2], and some other cyclizations. The types of the products depend on the substituents on the benzene ring and the reaction conditions. Reaction of cinnamylamines without substituents on the benzene ring and with halogens and OMe on the para position at room temperature gave cyclobutane-fused pyrrolidines as major products via [2 + 2] cycloaddition. The reaction at 80 °C in 1,2-dichloroethane gave δ-lactone fused pyrrolidines as major products, probably via ring-opening of the cyclobutanes. Interestingly, reaction of 1,1-diethyl 2-hydrogen ethenetricarboxylate and cinnamylamines bearing electron-withdrawing groups such as NO2, CN, CO2Me, CO2Et, and CF3 on ortho and para positions in the presence of EDCI/HOBt/Et3N at room temperature or at 60-80 °C gave tetrahydrobenz[f]isoindolines via [4 + 2] cycloaddition as major products. DFT studies have been performed to explained the observed [2 + 2]/[4 + 2] selectivity.
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Affiliation(s)
- Shoko Yamazaki
- Department of Chemistry, Nara University of Education , Takabatake-cho, Nara 630-8528, Japan
| | - Hirotaka Sugiura
- Department of Chemistry, Nara University of Education , Takabatake-cho, Nara 630-8528, Japan.,Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University , Gakuen-cho 1-1, Nakaku, Sakai, Osaka 599-8531, Japan
| | - Shinnosuke Ohashi
- Department of Chemistry, Nara University of Education , Takabatake-cho, Nara 630-8528, Japan
| | - Keisuke Ishizuka
- Department of Chemistry, Nara University of Education , Takabatake-cho, Nara 630-8528, Japan
| | - Rina Saimu
- Department of Chemistry, Nara University of Education , Takabatake-cho, Nara 630-8528, Japan
| | - Yuji Mikata
- KYOUSEI Science Center, Nara Women's University , Nara 630-8506, Japan
| | - Akiya Ogawa
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University , Gakuen-cho 1-1, Nakaku, Sakai, Osaka 599-8531, Japan
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7
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Nguyen QNN, Tantillo DJ. When To Let Go—Diradical Intermediates from Zwitterionic Transition State Structures? J Org Chem 2016; 81:5295-302. [DOI: 10.1021/acs.joc.6b00533] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Q. Nhu N. Nguyen
- Department
of Chemistry, University of California—Davis, Davis, California 95616, United States
| | - Dean J. Tantillo
- Department
of Chemistry, University of California—Davis, Davis, California 95616, United States
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8
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Kang T, Ge S, Lin L, Lu Y, Liu X, Feng X. A Chiral
N
,
N′
‐Dioxide–Zn
II
Complex Catalyzes the Enantioselective [2+2] Cycloaddition of Alkynones with Cyclic Enol Silyl Ethers. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201600801] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Tengfei Kang
- Key Laboratory of Green Chemistry & Technology Ministry of Education College of Chemistry Sichuan University Chengdu 610064 China
| | - Shulin Ge
- Key Laboratory of Green Chemistry & Technology Ministry of Education College of Chemistry Sichuan University Chengdu 610064 China
| | - Lili Lin
- Key Laboratory of Green Chemistry & Technology Ministry of Education College of Chemistry Sichuan University Chengdu 610064 China
| | - Yan Lu
- Key Laboratory of Green Chemistry & Technology Ministry of Education College of Chemistry Sichuan University Chengdu 610064 China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology Ministry of Education College of Chemistry Sichuan University Chengdu 610064 China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology Ministry of Education College of Chemistry Sichuan University Chengdu 610064 China
- Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072 China
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9
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Kang T, Ge S, Lin L, Lu Y, Liu X, Feng X. A Chiral
N
,
N′
‐Dioxide–Zn
II
Complex Catalyzes the Enantioselective [2+2] Cycloaddition of Alkynones with Cyclic Enol Silyl Ethers. Angew Chem Int Ed Engl 2016; 55:5541-4. [DOI: 10.1002/anie.201600801] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2016] [Indexed: 12/20/2022]
Affiliation(s)
- Tengfei Kang
- Key Laboratory of Green Chemistry & Technology Ministry of Education College of Chemistry Sichuan University Chengdu 610064 China
| | - Shulin Ge
- Key Laboratory of Green Chemistry & Technology Ministry of Education College of Chemistry Sichuan University Chengdu 610064 China
| | - Lili Lin
- Key Laboratory of Green Chemistry & Technology Ministry of Education College of Chemistry Sichuan University Chengdu 610064 China
| | - Yan Lu
- Key Laboratory of Green Chemistry & Technology Ministry of Education College of Chemistry Sichuan University Chengdu 610064 China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology Ministry of Education College of Chemistry Sichuan University Chengdu 610064 China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology Ministry of Education College of Chemistry Sichuan University Chengdu 610064 China
- Collaborative Innovation Center of Chemical Science and Engineering Tianjin 300072 China
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10
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Sequential oxidation/thermal induced intramolecular [2+2] cycloaddition of propynol-vinylidenecyclopropanes: access to novel cyclobutene-containing spiro[2.3]hexenes. Tetrahedron 2016. [DOI: 10.1016/j.tet.2015.11.064] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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11
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Lan P, Banwell MG, Willis AC. Chemoenzymatic Synthesis of the Enantiomer of 4,12-Dihydroxysterpurene, the Structure Assigned to a Metabolite Isolated from the Culture Broth of Stereum purpureum. Org Lett 2014; 17:166-9. [DOI: 10.1021/ol5034817] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ping Lan
- Research School of Chemistry,
Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601, Australia
| | - Martin G. Banwell
- Research School of Chemistry,
Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601, Australia
| | - Anthony C. Willis
- Research School of Chemistry,
Institute of Advanced Studies, The Australian National University, Canberra, ACT 2601, Australia
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12
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Soriano E, Fernández I. Allenes and computational chemistry: from bonding situations to reaction mechanisms. Chem Soc Rev 2014; 43:3041-105. [DOI: 10.1039/c3cs60457h] [Citation(s) in RCA: 140] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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13
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Hori H, Arai S, Nishida A. A 2-Benzothiazolylphenyl Group Accelerates the Intramolecular [2+2] Cycloaddition of Allene-Ynes. ASIAN J ORG CHEM 2013. [DOI: 10.1002/ajoc.201300218] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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14
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Kitagaki S, Kajita M, Narita S, Mukai C. Cu-Promoted [2 + 2] Cycloaddition of 1,4-Bisallenes. Org Lett 2012; 14:1366-9. [DOI: 10.1021/ol300096u] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shinji Kitagaki
- Division of Pharmaceutical Sciences, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan.
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15
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Dadiboyena S, Nefzi A. Synthesis of functionalized tetrasubstituted pyrazolyl heterocycles – A review. Eur J Med Chem 2011; 46:5258-75. [DOI: 10.1016/j.ejmech.2011.09.016] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2011] [Revised: 08/21/2011] [Accepted: 09/12/2011] [Indexed: 10/17/2022]
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16
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Aubert C, Fensterbank L, Garcia P, Malacria M, Simonneau A. Transition Metal Catalyzed Cycloisomerizations of 1,n-Allenynes and -Allenenes. Chem Rev 2011; 111:1954-93. [PMID: 21391568 DOI: 10.1021/cr100376w] [Citation(s) in RCA: 544] [Impact Index Per Article: 41.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Corinne Aubert
- Institut Parisien de Chimie Moléculaire (UMR CNRS 7201), UPMC Univ Paris 06, 4 place Jussieu, C. 229, 75005 Paris, France
| | - Louis Fensterbank
- Institut Parisien de Chimie Moléculaire (UMR CNRS 7201), UPMC Univ Paris 06, 4 place Jussieu, C. 229, 75005 Paris, France
| | - Pierre Garcia
- Institut Parisien de Chimie Moléculaire (UMR CNRS 7201), UPMC Univ Paris 06, 4 place Jussieu, C. 229, 75005 Paris, France
| | - Max Malacria
- Institut Parisien de Chimie Moléculaire (UMR CNRS 7201), UPMC Univ Paris 06, 4 place Jussieu, C. 229, 75005 Paris, France
| | - Antoine Simonneau
- Institut Parisien de Chimie Moléculaire (UMR CNRS 7201), UPMC Univ Paris 06, 4 place Jussieu, C. 229, 75005 Paris, France
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17
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Sajna KV, Kotikalapudi R, Chakravarty M, Bhuvan Kumar NN, Swamy KCK. Cycloaddition Reactions of Allenylphosphonates and Related Allenes with Dialkyl Acetylenedicarboxylates, 1,3-Diphenylisobenzofuran, and Anthracene. J Org Chem 2011; 76:920-38. [DOI: 10.1021/jo102240u] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- K. V. Sajna
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, A. P., India
| | - Ramesh Kotikalapudi
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, A. P., India
| | - Manab Chakravarty
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, A. P., India
| | - N. N. Bhuvan Kumar
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, A. P., India
| | - K. C. Kumara Swamy
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, A. P., India
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18
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Siebert MR, Osbourn JM, Brummond KM, Tantillo DJ. Differentiating mechanistic possibilities for the thermal, intramolecular [2 + 2] cycloaddition of allene-ynes. J Am Chem Soc 2010; 132:11952-66. [PMID: 20687581 DOI: 10.1021/ja102848z] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Intramolecular [2 + 2] cycloaddition reactions of allene-ynes offer a quick and efficient route to fused bicyclic ring structures. Insights into the mechanism and regiochemical preferences of this reaction are provided herein on the basis of the results of quantum chemical calculations (B3LYP/6-31+G(d,p)) and select experiments; both indicate that the reaction likely proceeds through a stepwise diradical pathway where one radical center is stabilized through allylic delocalization. The influences of the length of the tether connecting the alkyne and allene and substituent effects are also discussed.
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Affiliation(s)
- Matthew R Siebert
- Department of Chemistry, University of California-Davis, One Shields Avenue, Davis, California 95616, USA
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19
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Alcaide B, Almendros P, Aragoncillo C, Gómez-Campillos G. Expeditious Entry to Enantiopure Mono- and Bis(Tricyclic) β-Lactams by Single or Double [2+2] Cycloaddition of Allenynes. European J Org Chem 2010. [DOI: 10.1002/ejoc.201001233] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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20
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Johnstone MD, Lowe AJ, Henderson LC, Pfeffer FM. Rapid synthesis of cyclobutene diesters using a microwave-accelerated ruthenium-catalysed [2+2] cycloaddition. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.08.119] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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21
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Brummond KM, Osbourn JM. A thermally-induced, tandem [3,3]-sigmatropic rearrangement/[2 + 2] cycloaddition approach to carbocyclic spirooxindoles. Beilstein J Org Chem 2010; 6:33. [PMID: 20502602 PMCID: PMC2874392 DOI: 10.3762/bjoc.6.33] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2010] [Accepted: 03/31/2010] [Indexed: 12/04/2022] Open
Abstract
The synthesis of C3-carbocyclic spirooxindoles was realized by way of an intramolecular [2 + 2] cycloaddition reaction between a vinylidene indolin-2-one and an alkyne. The cycloaddition reaction occurs selectively with the distal double bond of the allene, is tolerant of a phenyl and trimethylsilyl group on the terminus of the alkyne, and can be used to access bicyclo[4.2.0]octadienes and bicyclo[5.2.0]nonadienes. The allene precursors are not observed, but are likely intermediates of an infrequently encountered thermal [3,3]-sigmatropic rearrangement of a propargylic acetate.
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Affiliation(s)
- Kay M Brummond
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA.
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22
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Appukkuttan P, Mehta VP, Van der Eycken EV. Microwave-assisted cycloaddition reactions. Chem Soc Rev 2010; 39:1467-77. [DOI: 10.1039/b815717k] [Citation(s) in RCA: 135] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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23
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24
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Alcaide B, Almendros P, Aragoncillo C. Exploiting [2+2] cycloaddition chemistry: achievements with allenes. Chem Soc Rev 2010; 39:783-816. [DOI: 10.1039/b913749a] [Citation(s) in RCA: 303] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Pardo-Rodríguez V, Marco-Martínez J, Buñuel E, Cárdenas DJ. Pd-Catalyzed Borylative Cyclization of Allenynes and Enallenes. Org Lett 2009; 11:4548-51. [DOI: 10.1021/ol9017694] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Virtudes Pardo-Rodríguez
- Departamento de Química Orgánica, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
| | - Juan Marco-Martínez
- Departamento de Química Orgánica, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
| | - Elena Buñuel
- Departamento de Química Orgánica, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
| | - Diego J. Cárdenas
- Departamento de Química Orgánica, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain
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26
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A new and general route to 2-pyrrolylglycine, 2-pyrrolylalanine and homo-2-pyrrolylalanine derivatives. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.tetasy.2009.06.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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27
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Stereoselective synthesis of 2-azetidinylglycine and aminopyrrolidone derivatives from Garner’s aldehyde. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.tetasy.2009.04.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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28
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Kappe CO, Dallinger D. Controlled microwave heating in modern organic synthesis: highlights from the 2004–2008 literature. Mol Divers 2009; 13:71-193. [PMID: 19381851 DOI: 10.1007/s11030-009-9138-8] [Citation(s) in RCA: 292] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2009] [Accepted: 02/27/2009] [Indexed: 01/25/2023]
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29
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Concise syntheses of stereoisomeric hexahydroazepine derivatives related to the protein kinase inhibitor balanol. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.07.031] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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A short route to N-protected furanomycin, 5′-epi-furanomycin and isofuranomycin derivatives. ACTA ACUST UNITED AC 2008. [DOI: 10.1016/j.tetasy.2008.07.032] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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