Tandem Carbon−Carbon Bond Constructions via Catalyzed Cyanation/Brook Rearrangement/C-Acylation Reactions of Acylsilanes
作者:Xin Linghu、David A. Nicewicz、Jeffrey S. Johnson
DOI:10.1021/ol0263649
日期:2002.8.1
see text] A tandem nucleophile-catalyzed cyanation/Brook rearrangement/C-acylation has been developed. Phase transfer cocatalysts facilitate cyanide-catalyzed reactions between acylsilanes and cyanoformates to afford protected tertiary carbinol products. A catalytic cycle is proposed involving cyanation of an acylsilane, [1,2]-Brook rearrangement, and C-acylation of the derived carbanion by a cyanoformate
[反应:见正文]已经开发了串联亲核试剂催化的氰化/布鲁克重排/ C-酰化反应。相转移助催化剂促进酰基硅烷和氰基甲酸酯之间氰化物催化的反应,从而提供受保护的叔甲醇产物。提出了一种催化循环,包括酰基硅烷的氰化,[1,2]-布鲁克重排以及氰基甲酸酯对衍生的碳负离子进行C-酰化。该反应提供了制备官能化的不对称丙二酸衍生物的有效方法。