Asymmetric synthesis of α,α-disubstituted α-amino alcohol derivatives
摘要:
Herein we report the asymmetric synthesis of alpha,alpha-disubstituted alpha-amino alcohol derivatives 22, 25 and 26, key intermediates of a novel immunomodulator, using Seebach's method. This synthetic method can be applied to the large scale synthesis of chiral sphingosine 1-phosphate-1 (S1P(1)) receptor agonists, with significant improvements to the previously reported method with regard to the reaction temperature. (C) 2011 Elsevier Ltd. All rights reserved.