Chemical and Enzymatic Resolution of (<i>R,S</i>)-<i>N</i>-(<i>tert</i>-Butoxycarbonyl)-3-hydroxymethylpiperidine
作者:Animesh Goswami、Jeffrey M. Howell、Edward Y. Hua、K. David Mirfakhrae、Maxime C. Soumeillant、Shankar Swaminathan、Xinhua Qian、Fernando A. Quiroz、Truc C. Vu、Xuebao Wang、Bin Zheng、David R. Kronenthal、Ramesh N. Patel
DOI:10.1021/op010210b
日期:2001.7.1
(S)-N-(tert-Butoxycarbonyl)-3-hydroxymethylpiperidine 1 was made from (R,S)-3-hydroxymethylpiperidine 2 via fractional crystallization of the corresponding L(-)-dibenzoyl tartarate salt 3 followed by hydrolysis and acylation. Lipase from Pseudomonas cepacia was found to be the best enzyme for the stereospecific resolution of (RS)-N-(tert-butoxycarbonyl)-3-hydroxymethylpiperidine 4. (S)-N-(tert-Butoxycarbonyl)-3-hydroxymethylpiperidine I was obtained in 16% yield and >95% enantiomeric excess (ee) by hydrolysis of (R,S)-acetate 5 by lipase PS from Pseudomonas cepacia. Lipase PS-catalyzed esterification of the (RS)-N-(tert-butoxycarbonyl)-3-hydroxymethylpiperidine 4 with succinic anhydride provided the S-hemisuccinate ester 6, which could be easily separated and hydrolyzed by base to the (S)-N-(tert-butoxycarbonyl)-3-hydroxymethylpiperidine 1. The yield and ee could be improved greatly by repetition of the process. Using the repeated esterification procedure(S)-N-(tert-butoxycarbonyl)-3-hydroxymethylpiperidine I was obtained in 32% yield (maximum theoretical yield 50%) and 98.9% ee.