Highly diastereoselective alkylation of vicinal dianions of chiral succinic acid derivatives: a new general strategy to (R)-β-arylmethyl-γ-butyrolactones
作者:Manat Pohmakotr、Darunee Soorukram、Patoomratana Tuchinda、Samran Prabpai、Palangpon Kongsaeree、Vichai Reutrakul
DOI:10.1016/j.tetlet.2004.04.008
日期:2004.5
The vicinal dianions derived from chiral succinic acid derivatives, 1,4-bis[(4R,5S)-3,4-dimethyl-2-oxo-5-phenylimidazolidin-1-yl]butane-1,4-dione and 1,4-bis[(4S,5R)-3,4-dimethyl-2-oxo-5-phenylimidazolidin-1-yl]butane-1,4-dione react with arylmethyl bromides with high diastereo- and regio-selectivity to provide the corresponding chiral α-arylmethylated succinic acid derivatives; the (R)-products are
衍生自手性琥珀酸衍生物,1,4-双[(4 R,5 S)-3,4-二甲基-2-氧-2-氧-5-苯基咪唑啉-1-基]丁烷-1,4-二酮的邻位二价阴离子和1,4-双[(4 S,5 R)-3,4-二甲基-2-氧代-5-苯基咪唑啉-1-基]丁烷-1,4-二酮与芳基甲基溴化物反应,具有高非对映体和区域-提供相应的手性α-芳基甲基化琥珀酸衍生物的选择性;(R)产物被转化为(R)-β-芳基甲基-γ-丁内酯和(R)-α-芳基甲基-γ-丁内酯。