Lithium bis[(1R,5R)-3-aza-3-benzyl-1,5-diphenylpentan-1,5-diolato]-aluminium — A new heterobimetallic catalyst for Michael addition reactions
作者:G Manickam、G Sundararajan
DOI:10.1016/s0040-4020(99)00044-7
日期:1999.2
LiAlH4 to give the heterobimetallic complex 2 of the composition [(12-Al)Li]. Complex 2 was characterised by 1H-, 13C-, 27Al- and 7Li-NMR spectral data. Also, 2 when used in catalytic amounts accelerates Michael addition of malonates and thiophenol to α,β-unsaturated compounds like aldehydes, ketones, cyano and nitro compounds with high yield. Asymmetric induction in the Michael adducts has also been
的c ^ 2 -对称氨基二醇,(1 - [R,5 - [R)-3-氮杂-3-苄基-1,5-二苯基戊-1,5-二醇,1 - [(R,R)-1 ]与发生反应的LiAlH参见图4,得到组成为[(1 2 -Al)Li]的杂双金属配合物2。配合物2的特征在于1 H-,13 C-,27 Al-和7 Li-NMR光谱数据。还有2当以催化量使用时,以高收率促进丙二酸酯和硫酚的迈克尔加成到α,β-不饱和化合物(如醛,酮,氰基和硝基化合物)上。当使用对映体纯的催化剂2时,还观察到迈克尔加合物中的不对称诱导。