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Bhosale VA, Waghmode SB. Stereodivergent approach to Alzheimer's therapeutic agent ( R )-(−) and ( S )-(+)-arundic acid employing chiral 4-pentenol derivatives as building blocks. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.03.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Lu C, Lu T, Nie Q, Yang G, Chen Z. A New Process for the Synthesis of ( 2S,3S)-2-Ethyl-3-Methylvaleramide. JOURNAL OF CHEMICAL RESEARCH 2014. [DOI: 10.3184/174751914x13975731462355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A new process for synthesis of ( 2S,3S)-2-ethyl-3-methylvaleramide has been developed via the key step of a diastereoselective alkylation reaction using non-cross-linked polystyrene (NCPS) supported ( 4S)-2-phenylimino-2-oxazolidine as a chiral auxiliary. This method is efficient with the target product obtained in 99.24% ee and 38.4% overall yield and the chiral auxiliaries can be recovered quantitatively by simple filtration.
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Affiliation(s)
- Cuifen Lu
- Hubei Collaborative Innovation Center for Advanced Organochemical Materials & Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei University, Wuhan 430062, P.R. China
| | - Taotao Lu
- Hubei Collaborative Innovation Center for Advanced Organochemical Materials & Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei University, Wuhan 430062, P.R. China
| | - Qunqi Nie
- Hubei Collaborative Innovation Center for Advanced Organochemical Materials & Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei University, Wuhan 430062, P.R. China
| | - Guichun Yang
- Hubei Collaborative Innovation Center for Advanced Organochemical Materials & Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei University, Wuhan 430062, P.R. China
| | - Zuxing Chen
- Hubei Collaborative Innovation Center for Advanced Organochemical Materials & Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Hubei University, Wuhan 430062, P.R. China
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