Lewis Acid-Promoted Regio- and Diastereoselective Cross-Coupling of Aryl-Substituted 1,2-Diols and Boronic Acids
作者:Heesun Yu、Ryangha Lee、Hyoungsu Kim、Dongjoo Lee
DOI:10.1021/acs.joc.9b00209
日期:2019.3.15
A Lewis acid-promoted highly regio- and diastereoselective C(sp3)–C(sp2) cross-coupling reaction between unprotected aryl-substituted 1,2-diols and styryl-, aryl-, heteroaryl-, and polyarylboronic acids has been developed in a one-pot procedure. The regioselective opening of aryl-substituted cyclic boronic esters promoted by a Lewis acid followed by subsequent intramolecular 1,4-transfer of the carbon
路易斯酸促进了未保护的芳基取代的1,2-二醇与苯乙烯基,芳基,杂芳基和聚芳基硼酸之间的高区域和非对映选择性C(sp 3)–C(sp 2)交叉偶联反应。以一锅法开发。路易斯酸促进芳基取代的环状硼酸酯的区域选择性开放,随后碳配体从硼分子内1,4-分子内转移至共振稳定的苄基碳鎓离子,从而以立体选择性方式使烯丙基1,3-应变最小化导致相应的α取代型顺式-苯乙基醇。该方法的合成效用通过短而有效的对映异构选择性合成cherylline diethyl ether(-)- 16进行了说明。