Rhodium-catalyzed enantioselective 1,2-addition of arylboronic acids to heteroaryl α-ketoesters for synthesis of heteroaromatic α-hydroxy esters
作者:Hui Wang、Ting-Shun Zhu、Ming-Hua Xu
DOI:10.1039/c2ob26316e
日期:——
The first example of catalytic asymmetric 1,2-addition of arylboronic acids to heteroaryl α-ketoesters has been developed for the highly efficient and enantioselective synthesis of quaternary carbon-containing heteroaromatic α-hydroxy esters. The reaction works well with a variety of α-ketoesters including 3-indoleglyoxylates, 3-benzofuranglyoxylates and 3-benzothiopheneglyoxylates under very mild conditions, affording the corresponding products in moderate to good yields with high enantiomeric excesses (up to 97%).
第一例催化不对称1,2-加成芳基硼酸到杂芳类α-酮酯的反应已经被开发,用于高效和选择性合成四次碳含量的杂芳类α-羟基酯。在非常温和的条件下,该反应对多种α-酮酯表现良好,包括3-吲哚乙二酸酯、3-苯并呋喃乙二酸酯和3-苯并噻吩乙二酸酯,产物的收率中等到良好,且具有高的对映体过量(高达97%)。