ON THE WAY TO CHIRAL COPPER(I) ARENETHIOLATE CATALYSTS FOR THE ENANTIOSELECTIVE CONJUGATE ADDITION OF METHYL LITHIUM AND METHYL MAGNESIUM IODIDE TO BENZYLIDENEACETONE

被引:78
作者
LAMBERT, F [1 ]
KNOTTER, DM [1 ]
JANSSEN, MD [1 ]
VANKLAVEREN, M [1 ]
BOERSMA, J [1 ]
VANKOTEN, G [1 ]
机构
[1] UNIV UTRECHT,DEBYE RES INST,DEPT METAL MEDIATED SYNTH,PADUALAAN 8,3584 CH UTRECHT,NETHERLANDS
关键词
D O I
10.1016/S0957-4166(00)82005-4
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Selective conjugate addition (0 % enantiomeric excess (e.e.)) of organoarenethiolatocuprates (from methyl lithium and 2-[1-(R)-(dimethylamino)ethyl]phenylthiolatocopper(I), CuSAr*) to benzylideneacetone (BA) is found up to a LiMe/CuSAr* ratio of 2/1 indicating the potential of the chiral SAr*-anion as non-transferable group; at higher ratios only 1,2-addition occurs. Reactions of methyl magnesium iodide with BA in the presence of a catalytic amount of CuSAr* (9 mol%) result in exclusive conjugate addition with 57% e.e..
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页码:1097 / 1100
页数:4
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