An Efficient Synthesis of C<sub>2</sub>-Symmetric Chiral Binaphthyl Ketone Catalysts
作者:Toshiyuki FURUTANI、Masanori HATSUDA、Toshiaki SHIMIZU、Masahiko SEKI
DOI:10.1271/bbb.65.180
日期:2001.1
An efficient synthesis of C2-symmetric chiral binaphthyl ketones 1a and b, effective catalysts for asymmetric epoxidation, is reported. The key features of this synthesis are Co(salen)-catalyzed macrolactonization of racemic 1,1'-binaphthyl-2,2'-dicarboxylic acid monoglycidyl esters 3a and b and lipase-catalyzed enantioselective acylation of resulting 11-membered cyclic binaphthyl alcohols 4a and b
据报道,C 2对称的手性双萘基酮1a和b的有效合成,是不对称环氧化的有效催化剂。该合成的关键特征是外消旋1,1'-联萘-2,2'-二羧酸单缩水甘油酯3a和b的Co(salen)催化大内酯化和脂肪酶催化的11元环状联萘醇4a的对映选择性酰化和b。