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.
SEEBACH, DIETER;DZIADULEWICZ, EDWARD;BEHRENDT, LINDA;CONTOREGGI, SERGIO;F+, LIEBIGS ANN. CHEM.,(1989) N2, C. 1215-1232