Efficient large scale stereoinversion of (R)-ethyl 3-hydroxybutyrate
作者:Andrew J. Carnell、Robert Head、Derek Bassett、Michael Schneider
DOI:10.1016/j.tetasy.2003.12.005
日期:2004.3
A three step method for the large scale preparation of enantiomerically pure ethyl (S)-3-hydroxybutyrate is reported starting from the commercial biopolymer poly[(R)-hydroxybutyrate]. The key step depends on the ability to cleanly invert the stereochemistry of (R)-ethyl 3-hydroxybutyrate via its mesylate ester under neutral conditions, avoiding the competing elimination process. This has been achieved in good (75%) yield on >100 g scale by controlled addition of the mesylate to a stirred slurry of calcium carbonate in water at 80 degreesC. (C) 2003 Elsevier Ltd. All rights reserved.
Kitahara, Takeshi; Furusho, Yoshio; Mori, Kenji, Bioscience, Biotechnology and Biochemistry, 1993, vol. 57, # 7, p. 1137 - 1140
作者:Kitahara, Takeshi、Furusho, Yoshio、Mori, Kenji
DOI:——
日期:——
KALIVRETENOS, A.;STILLE, J. K.;HEGEDUS, L. S., J. ORG. CHEM., 56,(1991) N, C. 2883-2894