Enantioselective Intramolecular Benzylic CH Bond Amination: Efficient Synthesis of Optically Active Benzosultams
作者:Masami Ichinose、Hidehiro Suematsu、Yoichi Yasutomi、Yota Nishioka、Tatsuya Uchida、Tsutomu Katsuki
DOI:10.1002/anie.201101801
日期:2011.10.10
'Salen' along: The iridium(III)–salen complex 1 efficiently catalyzes the title reaction of 2‐ethylbenzenesulfonyl azides to give five‐membered sultams with high enantioselectivity. Other 2‐alkyl‐substitued substrates lead to five‐ and six‐membered sultams with high enantioselectivity; the regioselectivity depends upon the substrate and the catalyst used. EDG=electron‐donating group.
沿'Salen'方向移动:铱(III)-salen配合物1有效催化2-乙基苯磺酰叠氮化物的标题反应,从而产生具有高对映选择性的五元磺胺。其他的被2-烷基取代的底物导致对映体选择性高的五元和六元均聚物。区域选择性取决于所用的底物和催化剂。EDG =给电子基团。