Preparation of enantiopure butane-2,3-diacetals of glycolic acid and alkylation reactions leading to α-hydroxyacid and amide derivatives
作者:Steven V. Ley、Elena Diez、Darren J. Dixon、Richard T. Guy、Patrick Michel、Gillian L. Nattrass、Tom D. Sheppard
DOI:10.1039/b412788a
日期:——
The preparation of butane-2,3-diacetal protected glycolic acid and related systems is described together with highly selective alkylation reactions of (R,R) and (S,S) butanediacetal protected glycolic acid. These compounds are readily deprotected to give enantiopure alpha-hydroxyacids, alpha-hydroxyesters or alpha-hydroxyamides by suitable choice of conditions.
描述了由2,3-二缩醛丁烷保护的乙醇酸的制备方法和相关系统,以及(R,R)和(S,S)丁二缩醛保护的乙醇酸的高度选择性烷基化反应。这些化合物可容易地脱保护,得到对映体纯的α-羟基酸,由条件适当选择的α-羟基酯或α-羟基酰胺。