Asymmetric synthesis of 2-alkyl-3-thiazoline carboxylates: stereochemistry of the MnO2-mediated oxidation of cis- and trans-2-alkyl-thiazolidine-(4R)-carboxylates
作者:Xavier Fernandez、Elisabet Duñach
DOI:10.1016/s0957-4166(01)00219-1
日期:2001.6
The asymmetric synthesis of a series of 3-thiazoline carboxylates, 2, was effected by MnO2 oxidation of the corresponding cis/trans thiazolidines, 1. The stereochemistry of the oxidation reaction was studied using NMR and chiral GC analyses. Compounds 2 were obtained with enantiomeric excesses (e.e.s) in the range of 40–100%.
一系列3-噻唑啉羧酸盐2的不对称合成是通过MnO 2氧化相应的顺/反噻唑烷1来实现的。使用NMR和手性GC分析研究了氧化反应的立体化学。获得的化合物2的对映体过量(ee)在40-100%的范围内。