method consisted of electrochemical α′-methoxylation of the α-amino acid derivatives, the replacement of the α′-methoxy group with a phenylthio group, α-methylation, and reductive removal of the α′-phenylthio group, successively. The intermediates in this method could be used for the preparation of opticallyactive acyclic α-methylated α-amino acids.
Seebach, Dieter; Dziadulewicz, Edward; Behrendt, Linda, Liebigs Annalen der Chemie, 1989, p. 1215 - 1232
作者:Seebach, Dieter、Dziadulewicz, Edward、Behrendt, Linda、Cantoreggi, Sergio、Fitzi, Robert
DOI:——
日期:——
An efficient, asymmetric synthesis of pipecolic acid and 2-alkyl pipecolic acids
作者:Duen-Ren Hou、Shin-Yi Hung、Chung-Cheng Hu
DOI:10.1016/j.tetasy.2005.10.025
日期:2005.11
Both (R)- and (S)-pipecolic acids and their 2-alkyl derivatives have been synthesized via diastereoselective alkylations of (R)-5-phenylmorpholin-2-one 5. (c) 2005 Elsevier Ltd. All rights reserved.
Asymmetric Synthesis. 32. A New Access to Enantiomerically Pure (S)-(-)-Pipecolic Acid and 2- or 6-Alkylated Derivatives
作者:J.-F. Berrien、J. Royer、H.-P. Husson
DOI:10.1021/jo00093a007
日期:1994.7
Enantiomerically pure (S)-(-)-pipecolic acid (5) was synthesized in four steps and 47% overall yield starting from 2-cyano-6-phenyloxazolopiperidine (1). A general strategy is described for preparing 2-alkylated and 6-alkylated pipecolic acid 7a-c and 11a-c using diastereoselective procedures.
Wanner, Klaus Th.; Stamenitis, Stamatios, Liebigs Annalen der Chemie, 1993, # 5, p. 477 - 484