作者:Timothy J Donohoe、Madeleine Helliwell、Clare A Stevenson、Tamara Ladduwahetty
DOI:10.1016/s0040-4039(98)00361-x
日期:1998.5
The preparation and Birch reduction of chiral 3-methyl-2-furoic acid derivatives is described. Using a C2 symmetrical amine as a chiral auxiliary, very high levels of sterochemical control could be obtained. Moreover, the auxiliary could be removed conveniently by heating in 6M HCl to liberate a carboxylic acid of high enantiomeric purity. The relative stereochemistry of the Birch reduced amides (and
描述了手性3-甲基-2-糠酸衍生物的制备和桦木还原。使用C 2对称胺作为手性助剂,可以获得很高水平的立体化学控制。而且,可以通过在6M HCl中加热以释放高对映体纯度的羧酸来方便地除去助剂。桦木还原酰胺的相对立体化学(因此相应酸的绝对立体化学)是根据X射线晶体结构确定的。