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Wåhlander J, Amedjkouh M, Gundersen LL. Synthesis directed towards trans-clerodanes employing an exo-selective Diels–Alder reaction as a key-step. MONATSHEFTE FUR CHEMIE 2018. [DOI: 10.1007/s00706-018-2277-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Ozeki M, Hayama N, Fukutome S, Egawa H, Arimitsu K, Kajimoto T, Hosoi S, Iwasaki H, Kojima N, Node M, Yamashita M. Construction of Seven Contiguous Chiral Centers by Two Methods: Quadruple Michael Addition vs Stepwise Double-Double Michael Addition Controlled by Adding Speed of Michael Acceptor. ChemistrySelect 2016. [DOI: 10.1002/slct.201600620] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Minoru Ozeki
- Department of Pharmaceutical Manufacturing Chemistry; Kyoto Pharmaceutical Universit; 1 Shichono-cho, Misasagi, Yamashina-ku Kyoto 606-8414 Japan
| | - Noboru Hayama
- Department of Pharmaceutical Manufacturing Chemistry; Kyoto Pharmaceutical Universit; 1 Shichono-cho, Misasagi, Yamashina-ku Kyoto 606-8414 Japan
| | - Shintaro Fukutome
- Department of Pharmaceutical Manufacturing Chemistry; Kyoto Pharmaceutical Universit; 1 Shichono-cho, Misasagi, Yamashina-ku Kyoto 606-8414 Japan
| | - Honoka Egawa
- Department of Pharmaceutical Manufacturing Chemistry; Kyoto Pharmaceutical Universit; 1 Shichono-cho, Misasagi, Yamashina-ku Kyoto 606-8414 Japan
| | - Kenji Arimitsu
- Department of Pharmaceutical Manufacturing Chemistry; Kyoto Pharmaceutical Universit; 1 Shichono-cho, Misasagi, Yamashina-ku Kyoto 606-8414 Japan
| | - Tetsuya Kajimoto
- Department of Pharmaceutical Manufacturing Chemistry; Kyoto Pharmaceutical Universit; 1 Shichono-cho, Misasagi, Yamashina-ku Kyoto 606-8414 Japan
- Medicinal Organic Chemistry Lab.; College of Pharmaceutical Sciences; Ritsumeikan University; 1-1-1 Noji-higashi, Kusatsu Shiga 525-8577 Japan
| | - Shinzo Hosoi
- Department of Pharmaceutical Manufacturing Chemistry; Kyoto Pharmaceutical Universit; 1 Shichono-cho, Misasagi, Yamashina-ku Kyoto 606-8414 Japan
| | - Hiroki Iwasaki
- Department of Pharmaceutical Manufacturing Chemistry; Kyoto Pharmaceutical Universit; 1 Shichono-cho, Misasagi, Yamashina-ku Kyoto 606-8414 Japan
| | - Naoto Kojima
- Department of Pharmaceutical Manufacturing Chemistry; Kyoto Pharmaceutical Universit; 1 Shichono-cho, Misasagi, Yamashina-ku Kyoto 606-8414 Japan
| | - Manabu Node
- Department of Pharmaceutical Manufacturing Chemistry; Kyoto Pharmaceutical Universit; 1 Shichono-cho, Misasagi, Yamashina-ku Kyoto 606-8414 Japan
| | - Masayuki Yamashita
- Department of Pharmaceutical Manufacturing Chemistry; Kyoto Pharmaceutical Universit; 1 Shichono-cho, Misasagi, Yamashina-ku Kyoto 606-8414 Japan
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Saunthwal RK, Patel M, Kumar S, Verma AK. Cu(II)-catalyzed tandem synthesis of 2-imino[1,3]benzothiazines from 2-aminoaryl acrylates via thioamidation and concomitant chemoselective thia-Michael addition. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2014.12.058] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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4
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Aitken RA, Ali K. Mono-, di- and trithioorthocarbamates. J Sulphur Chem 2013. [DOI: 10.1080/17415993.2012.758726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- R. Alan Aitken
- a EaStCHEM School of Chemistry, University of St Andrews , St Andrews , UK
| | - Karamat Ali
- a EaStCHEM School of Chemistry, University of St Andrews , St Andrews , UK
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Pyrrolidine catalyzed novel domino reaction for the synthesis of polysubstituted 4-oxocyclohexanecarbaldehyde derivatives. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2012.12.125] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Affiliation(s)
- Hélène Pellissier
- Aix-Marseille Université, UMR CNRS 7313 Institut des Sciences Moléculaires de Marseille Equipe Chirosciences, Case 561, Campus Saint Jérôme Avenue Esc. Normandie-Niemen, 13397 Marseille Cedex 20, France
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7
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Munive L, Rivas VM, Ortiz A, Olivo HF. Oxazolidine-2-thiones and Thiazolidine-2-thiones as Nucleophiles in Intermolecular Michael Additions. Org Lett 2012; 14:3514-7. [DOI: 10.1021/ol301489y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Laura Munive
- Division of Medicinal and Natural Products Chemistry, The University of Iowa, Iowa City, Iowa 52242, United States, and Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, Puebla 72570, Mexico
| | - Veronica M. Rivas
- Division of Medicinal and Natural Products Chemistry, The University of Iowa, Iowa City, Iowa 52242, United States, and Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, Puebla 72570, Mexico
| | - Aurelio Ortiz
- Division of Medicinal and Natural Products Chemistry, The University of Iowa, Iowa City, Iowa 52242, United States, and Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, Puebla 72570, Mexico
| | - Horacio F. Olivo
- Division of Medicinal and Natural Products Chemistry, The University of Iowa, Iowa City, Iowa 52242, United States, and Facultad de Ciencias Químicas, Benemérita Universidad Autónoma de Puebla, Puebla 72570, Mexico
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Watanabe SI, Kataoka T. Tandem Reactions Initiated by the Conjugate Addition of Chalcogen Compounds ― Utilization and Synthesis of Heterocycles ―. HETEROCYCLES 2011. [DOI: 10.3987/rev-10-682] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Ozeki M, Ochi S, Hayama N, Hosoi S, Kajimoto T, Node M. One-Pot Construction of Multiple Contiguous Chiral Centers Using Michael Addition of Chiral Amine. J Org Chem 2010; 75:4201-11. [DOI: 10.1021/jo1004586] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Minoru Ozeki
- Department of Pharmaceutical Manufacturing Chemistry, 21st COE Program, Kyoto Pharmaceutical University, 1 Shichono-cho, Misasagi, Yamashina-ku, Kyoto 607-8412, Japan
| | - Shunsuke Ochi
- Department of Pharmaceutical Manufacturing Chemistry, 21st COE Program, Kyoto Pharmaceutical University, 1 Shichono-cho, Misasagi, Yamashina-ku, Kyoto 607-8412, Japan
| | - Noboru Hayama
- Department of Pharmaceutical Manufacturing Chemistry, 21st COE Program, Kyoto Pharmaceutical University, 1 Shichono-cho, Misasagi, Yamashina-ku, Kyoto 607-8412, Japan
| | - Shinzo Hosoi
- Department of Pharmaceutical Manufacturing Chemistry, 21st COE Program, Kyoto Pharmaceutical University, 1 Shichono-cho, Misasagi, Yamashina-ku, Kyoto 607-8412, Japan
| | - Tetsuya Kajimoto
- Department of Pharmaceutical Manufacturing Chemistry, 21st COE Program, Kyoto Pharmaceutical University, 1 Shichono-cho, Misasagi, Yamashina-ku, Kyoto 607-8412, Japan
| | - Manabu Node
- Department of Pharmaceutical Manufacturing Chemistry, 21st COE Program, Kyoto Pharmaceutical University, 1 Shichono-cho, Misasagi, Yamashina-ku, Kyoto 607-8412, Japan
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Ozeki M, Node M. Development of the Efficient Asymmetric Synthesis Utilizing Characteristic of Chiral Auxiliary. J SYN ORG CHEM JPN 2010. [DOI: 10.5059/yukigoseikyokaishi.68.854] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Minoru Ozeki
- Department of Pharmaceutical Manufacturing Chemistry, Kyoto Pharmaceutical University
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Palomo C, Oiarbide M, López R, González PB, Gómez-Bengoa E, Saá JM, Linden A. Intramolecular Sulfur Transfer in N-Enoyl Oxazolidine-2-thiones Promoted by Brønsted Acids. Practical Asymmetric Synthesis of β-Mercapto Carboxylic Acids and Mechanistic Insights. J Am Chem Soc 2006; 128:15236-47. [PMID: 17117876 DOI: 10.1021/ja0654027] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The ability of Brønsted acids alone to efficiently promote the sulfur transfer process in N-enoyl oxazolidine-2-thiones to give beta-mercapto carbonyl derivatives is demonstrated. The reactions proceed with essentially perfect diastereocontrol for a range of alkyl-substituted N-enoyl oxazolidine-2-thiones (d.r. regularly above 98:2) and high selectivity for most aryl-substituted counterparts (d.r. typically above 92:8). Importantly, the reaction works remarkably well in beta,beta-disubstituted N-enoyl oxazolidine-2-thiones as well, giving rise to quaternary C-S stereocenters in selectivities usually above 95:5. The relative efficiency of a range of acids (trifluoroacetic, difluoroacetic, acetic, triflic) is assessed showing TFA and TfOH as the most efficient and acetic acid as a totally inefficient reaction promoter. The new procedure complements the Lewis acid promoted reaction previously described by our group in two aspects: First, stereodivergent results are obtained for the Lewis acid or Brønsted acid promoted reactions of beta,beta-disubstituted enoyl compounds. Second, while the Brønsted acid promoted reactions are stereospecific, providing a good correlation between the substrate E/Z configuration and products stereochemistry, the reactions mediated by Lewis acids (BF3/OEt2) provide invariant d.r. values regardless of the E/Z composition of the starting olefin. The synthetic value of the method is illustrated by (a) removal of the oxazolidinone moiety from the rearranged products under reducing conditions (NaBH4, H2O-THF) which yields beta-mercapto alcohols and (b) treatment with Sm(OTf)3 in MeOH which affords the corresponding beta-mercapto carboxylic esters, both categories of compounds being isolated in up to 97% ee. Remarkably, the method constitutes the first general approach to highly enantioenriched building blocks bearing a quaternary C-S stereocenter. On the other hand, spectroscopic and inhibition experiments are carried out that demonstrate the participation of protons also in the Lewis acid promoted reactions. Finally, the computational studies carried out at the B3LYP/6-31G* level give support for an activation of the substrate enoyl by complexation with two molecules of either the Brønsted or Lewis acid and serve to explain the stereochemical outcome of the reactions.
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Affiliation(s)
- Claudio Palomo
- Departamento de Química OrgAnica I, Facultad de Química, Universidad del País Vasco, Apdo. 1072, 20080 San Sebastián, Spain.
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