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Wu X, Li W. The Applications of
β
‐Keto
Amides for Heterocycle Synthesis. J Heterocycl Chem 2022. [DOI: 10.1002/jhet.4497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Xiaoqiang Wu
- School of Materials and Chemistry University of Shanghai for Science and Technology Shanghai P. R. China
| | - Wanfang Li
- School of Materials and Chemistry University of Shanghai for Science and Technology Shanghai P. R. China
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2
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Atom-transfer radical cyclization of α-bromocarboxamides under organophotocatalytic conditions. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.152952] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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3
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Yamazaki S, Wada J, Kakiuchi K. Stereospecific cyclization reaction of alkenyl esters and amides of ethenetricarboxylate. CAN J CHEM 2015. [DOI: 10.1139/cjc-2015-0129] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The stereospecificity of the cyclization reaction of (E)- and (Z)-2-alkenyl esters and amides of ethenetricarboxylate has been examined. The reaction of (E)/(Z)-2-butenyl esters with AlCl3 or FeCl3 gave trans-substituted chlorinated γ-lactone diastereomers stereospecifically. (E)/(Z)-2-butenyl and pentenyl amides undergo an intramolecular ene reaction at room temperature gradually. At 80 °C, the (Z)-alkenyl amides were transformed to cis-substituted ene adducts and the (E)-amides were transformed to cis- and trans-substituted ene adduct mixtures. The reaction of (E)/(Z)-2-alkenyl amides with ZnI2 gave trans-substituted γ-lactam diastereomers stereospecifically along with the ene adducts.
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Affiliation(s)
- Shoko Yamazaki
- Department of Chemistry, Nara University of Education, Takabatake-cho, Nara 630-8528, Japan
| | - Junya Wada
- Department of Chemistry, Nara University of Education, Takabatake-cho, Nara 630-8528, Japan
| | - Kiyomi Kakiuchi
- Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST), Takayama, Ikoma, Nara 630-0192, Japan
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4
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Georgieva MK, Santos AG. A computational study on Lewis acid-catalyzed diastereoselective acyclic radical allylation reactions with unusual selectivity dependence on temperature and epimer precursor. J Org Chem 2014; 79:11483-95. [PMID: 25375894 DOI: 10.1021/jo502102s] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In stereoselective radical reactions, it is accepted that the configuration of the radical precursor has no impact on the levels of stereoinduction, as a prochiral radical intermediate is planar, with two identical faces, independently of its origin. However, Sibi and Rheault (J. Am. Chem. Soc. 2000, 122, 8873-8879) remarkably obtained different selectivities in the trapping of radicals originated from two epimeric bromides, catalyzed by chelating Lewis acids. The selectivity rationalization was made on the basis of different conformational properties of each epimer. However, in this paper we show that the two epimers have similar conformational properties, which implies that the literature proposal is unable to explain the experimental results. We propose an alternative mechanism, in which the final selectivity is dependent on different reaction rates for radical formation from each epimer. By introducing a different perspective of the reaction mechanism, our model also allows the rationalization of different chemical yields obtained from each epimer, a result not rationalized by the previous model. Adaptation to other radical systems, under different reaction conditions, is also possible.
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Affiliation(s)
- Miglena K Georgieva
- REQUIMTE, CQFB, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova Lisboa , 2829-516 Caparica, Portugal
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5
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Monks BM, Cook SP. Palladium-Catalyzed Intramolecular Iodine-Transfer Reactions in the Presence of β-Hydrogen Atoms. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201308534] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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6
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Monks BM, Cook SP. Palladium-Catalyzed Intramolecular Iodine-Transfer Reactions in the Presence of β-Hydrogen Atoms. Angew Chem Int Ed Engl 2013; 52:14214-8. [DOI: 10.1002/anie.201308534] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Revised: 10/09/2013] [Indexed: 11/06/2022]
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7
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Yamazaki S, Fujinami K, Maitoko Y, Ueda K, Kakiuchi K. Lewis Acid-Promoted Cyclization Reactions of Alkenyl Ethenetricarboxylates: Stereoselective Synthesis of 2-Oxotetrahydrofurans and 2-Oxopyrrolidines. J Org Chem 2013; 78:8405-16. [PMID: 23885757 DOI: 10.1021/jo401106m] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Shoko Yamazaki
- Department of Chemistry, Nara University of Education, Takabatake-cho, Nara 630-8528, Japan
| | - Ken Fujinami
- Department of Chemistry, Nara University of Education, Takabatake-cho, Nara 630-8528, Japan
| | - Yuki Maitoko
- Department of Chemistry, Nara University of Education, Takabatake-cho, Nara 630-8528, Japan
| | - Khota Ueda
- Department of Chemistry, Nara University of Education, Takabatake-cho, Nara 630-8528, Japan
| | - Kiyomi Kakiuchi
- Graduate School of Materials Science, Nara Institute of Science and Technology (NAIST), Takayama,
Ikoma, Nara 630-0192, Japan
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8
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Cai S, Zhang S, Zhao Y, Wang DZ. New Approach to Oximes through Reduction of Nitro Compounds Enabled by Visible Light Photoredox Catalysis. Org Lett 2013; 15:2660-3. [DOI: 10.1021/ol4009443] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shunyou Cai
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen, China 518055
| | - Shaolong Zhang
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen, China 518055
| | - Yaohong Zhao
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen, China 518055
| | - David Zhigang Wang
- Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Shenzhen Graduate School of Peking University, Shenzhen, China 518055
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10
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A diversity-oriented-synthesis protocol for scaffold discovery based on a general synthetic route to spirocycles. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.06.020] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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11
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Dalpozzo R, Bartoli G, Sambri L, Melchiorre P. Perchloric Acid and Its Salts: Very Powerful Catalysts in Organic Chemistry. Chem Rev 2010; 110:3501-51. [DOI: 10.1021/cr9003488] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Renato Dalpozzo
- Department of Chemistry, Università della Calabria, Ponte Bucci cubo 12/c,I-87030 Arcavacata di Rende (Cs), Italy
| | - Giuseppe Bartoli
- Department of Organic Chemistry “A. Mangini”, Università di Bologna, viale Risorgimento 4, I-40136 Bologna, Italy
| | - Letizia Sambri
- Department of Organic Chemistry “A. Mangini”, Università di Bologna, viale Risorgimento 4, I-40136 Bologna, Italy
| | - Paolo Melchiorre
- ICIQ - Institut Català d’Investigació Química, Avgda. Països Catalans 16, E-43007 Tarragona, Spain
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Nomura K, Matsubara S. Stereospecific Construction of Chiral Tertiary and Quaternary Carbon by Nucleophilic Cyclopropanation with Bis(iodozincio)methane. Chem Asian J 2010; 5:147-52. [DOI: 10.1002/asia.200900289] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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14
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Yang D, Lian GY, Yang HF, Yu JD, Zhang DW, Gao X. Synthesis of γ-Butyrolactams by Photoinduced PhSe Group Transfer Radical Cyclization and Formal Synthesis of (±)-Isocynometrine with Diphenyldiselenide as Promoter. J Org Chem 2009; 74:8610-5. [DOI: 10.1021/jo9017099] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dan Yang
- Department of Chemistry, Fudan University, Shanghai 200433, China
- Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Gao-Yan Lian
- Department of Chemistry, Fudan University, Shanghai 200433, China
| | - Hai-Feng Yang
- Department of Chemistry, Fudan University, Shanghai 200433, China
| | - Jin-Di Yu
- Department of Chemistry, Fudan University, Shanghai 200433, China
| | - Dan-Wei Zhang
- Department of Chemistry, Fudan University, Shanghai 200433, China
| | - Xiang Gao
- Department of Chemistry, Fudan University, Shanghai 200433, China
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Miyabe H, Yoshioka E, Kohtani S. Enantioselective Radical Cyclization for the Synthesis of Cyclic Compounds. HETEROCYCLES 2009. [DOI: 10.3987/rev-08-sr(d)8] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Wu J, Sun W, Xia HG, Sun X. A facile and highly efficient route to α-amino phosphonates via three-component reactions catalyzed by Mg(ClO4)2or molecular iodine. Org Biomol Chem 2006; 4:1663-6. [PMID: 16633557 DOI: 10.1039/b602536f] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three-component reactions of aldehydes, amines, and diethyl phosphite catalyzed by Mg(ClO4)2 or molecular iodine afforded the corresponding alpha-amino phosphonates in excellent yields under mild reaction conditions.
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Affiliation(s)
- Jie Wu
- Department of Chemistry, Fudan University, Shanghai, China.
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Cardinal-David B, Guérin B, Guindon Y. Synthesis of Tertiary and Quaternary Stereogenic Centers: A Diastereoselective Tandem Reaction Sequence Combining Mukaiyama and Free Radical-Based Allylation. J Org Chem 2004; 70:776-84. [PMID: 15675832 DOI: 10.1021/jo048687j] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Reported herein is a strategy employing a Mukaiyama reaction in tandem with a free radical-based allyl transfer reaction for the elaboration of functionalized tertiary and quaternary centers. The appropriate choice of alcohol-protecting group on the starting alpha-methyl-beta-hydroxyaldehyde and the nature of the Lewis acid used in the Mukaiyama reaction provided access to 3,4-anti and 3,4-syn aldolization products, precursors of the free-radical allylation reaction. After migration or exchange of the Lewis acid, the allyl transfer reaction with allyltributylstannane is then performed by taking advantage of the endocyclic effect, leading to the 2,3-anti relative stereochemistry. Importantly, (13)C NMR studies of the chelated intermediates are also reported and provide additional support for the endocyclic effect. In some cases, the remarkable reactivity of the aluminum-based Lewis acids allowed the use of allyltrimethylsilane, an interesting reagent from an ecological standpoint. The isolation of a key intermediate is also indicative of an atom transfer mechanism when the silicon-based reagent is employed.
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Affiliation(s)
- Benoit Cardinal-David
- Institut de recherches cliniques de Montréal (IRCM), Bio-organic Chemistry Laboratory, 110 Pine Avenue West, Montréal, Québec, Canada H2W 1R7
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