期刊
EUROPEAN JOURNAL OF ORGANIC CHEMISTRY
卷 2008, 期 3, 页码 524-531出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejoc.200700849
关键词
amino acids; natural products; lactams; carbonylation; hydrogenation
A new synthetic route to enantiopure (2S,4R)-4-hydroxypipecolic acid from commercial ethyl (3S)-4-chloro-3-hydroxybutanoate is reported. The synthesis is based on the Pd-catalyzed methoxycarbonylation of a 4-alkoxy-substituted delta-valerolactam-derived vinyl triflate followed by the stereocontrolled hydrogenation of the enamine double bond. The final product was obtained after exhaustive hydrolysis in 20% yield over 10 steps. ((C)Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008).
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