Regio- and stereoselective methods for the conversion of (2S,3R)-β-phenylglycidic acid esters to taxoids and other enantiopure (2R,3S)-phenylisoserine esters
作者:A. A. Afon’kin、L. M. Kostrikin、A. E. Shumeiko、A. F. Popov、A. A. Matveev、V. N. Matvienko、A. F. Zabudkin
DOI:10.1007/s11172-012-0302-4
日期:2012.11
A novel efficient method was proposed for the synthesis of enantiopure precursors of taxane-containing cytostatics, i.e., methyl esters of (2R,3S)- and (2S,3R)-N-benzoylphenylisoserine and similar taxoid esters. The method is based on the regio- and stereoselective hydrobromolysis of the corresponding trans-β-phenyl glycidate enatiomers, consecutive reactions of O-acylcarbamoylation of the obtained 3-bromohydrins, intramolecular cyclization to 4-phenyloxazolidin-2-one-5-carboxylic acid derivatives, and oxazolidinone ring opening.
提出了一种新的高效方法,用于合成含类固醇的对映体前体,即 (2R,3S)- 和 (2S,3R)-N- 苯甲酰基苯基异丝氨酸的甲酯以及类似的类固醇酯。该方法基于对相应的反式-β-苯基甘氨酸对映体进行区域和立体选择性氢溴酸分解,对得到的 3-溴烷烃进行 O-酰基氨基甲酰化的连续反应,分子内环化为 4-苯基恶唑啉-2-酮-5-羧酸衍生物,以及恶唑啉酮开环。