Asymmetric synthesis of allylic secondary alcohols: a new general approach for the preparation of α-amino acids
作者:Lorna J. Drummond、Andrew Sutherland
DOI:10.1016/j.tet.2010.05.066
日期:2010.7
A new general approach for the synthesis of optically active α-amino acids has been developed. The key steps involve a ruthenium catalysed cross-coupling reaction to give a range of α,β-unsaturated ketones, which were then reduced to allylic secondary alcohols in the presence of a chiral CBS oxazaborolidine. A thermal Overman rearrangement was used to prepare a series of allylic trichloroacetimidates
已经开发了合成光学活性α-氨基酸的新的通用方法。关键步骤涉及钌催化的交叉偶联反应,得到一系列α,β-不饱和酮,然后在手性CBS恶唑硼烷存在下将其还原为烯丙基仲醇。使用热超人重排制备了一系列烯丙基三氯乙亚氨酸酯,并将它们在标准条件下以良好的总产率转化为目标α-氨基酸。