Axially chiral bidentate N-heterocyclic carbene ligands derived from BINAM: rhodium and iridium complexes in asymmetric ketone hydrosilylation

被引：125
作者：
Chianese, AR [1 ]
Crabtree, RH [1 ]
机构：
[1] Yale Univ, Dept Chem, New Haven, CT 06520 USA
来源：
ORGANOMETALLICS | 2005年 / 24卷 / 18期
关键词：
D O I：
10.1021/om050323+
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
New bis(N-heterocyclic carbene) and N-heterocyclic carbene-naphthoxy ligands are synthesized in two steps from (S)-1,1'-diamino-2,2'-binaphthyl. Rhodium and iridium complexes of the carbene-naphthoxy ligands were applied to the catalytic asymmetric hydrosilylation of acetophenone with diphenylsilane. Low enantioselectivities (12-13% ee) were observed for the rhodium-catalyzed reaction, but moderate enantioselectivities (50-60% ee) were seen for iridium.
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收藏
页码：4432 / 4436
页数：5
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