861659-75-8Relevant articles and documents
Asymmetric 1,4-addition of aryltrialkoxysilanes to α,β-unsaturated esters and amides catalyzed by a chiral rhodium complex
Oi, Shuichi,Taira, Akio,Honma, Yoshio,Sato, Takashi,Inoue, Yoshio
, p. 598 - 602 (2007/10/03)
A highly enantioselective 1,4-addition of aryltrialkoxysilanes to α,β-unsaturated esters and amides was successfully catalyzed by a chiral rhodium complex generated from [Rh(cod)(MeCN)2]BF4 and (S)-BINAP.
Rhodium-catalyzed asymmetric 1,4-addition of arylboron reagents to α,β-unsaturated esters
Takaya, Yoshiaki,Senda, Taichi,Kurushima, Hiroaki,Ogasawara, Masamichi,Hayashi, Tamio
, p. 4047 - 4056 (2007/10/03)
Reaction of arylboron reagents, arylboronic acids or arylborates, which are readily accessible by lithiation of aryl bromides followed by treatment with trimethoxyborane, with α,β-unsaturated esters in the presence of rhodium/(S)-binap catalyst proceeded with high enantioselectivity to give high yields of optically active β-aryl esters of up to 98% ee. The enantioselectivity depends on the steric bulkiness of the ester moiety.