Novel Enantiomerically PureHeteroleptic Magnesium Complexes for Use in Enantioselective DeprotonationReactions
作者:Kenneth W. Henderson、William J. Kerr、Emma L. Carswell、Douglas Hayes、Claire J. Russell
DOI:10.1055/s-2003-39291
日期:——
Two classes of heteroleptic magnesium complexes, alkylmagnesium amides RMgNR2 and aryloxymagnesium amides ROMgNR2, have been prepared and subsequently shown to be efficient bases in the enantioselective deprotonation of substituted cyclic ketones. When compared with their magnesium bisamide counterparts, significantly different reactivity and selectivity profiles, including an unexpected reversal in enantioselectivity, has been observed with the new reagents.
已制备两类异配位镁配合物,即烷基镁氨基化合物 RMgNR2 和芳氧基镁氨基化合物 ROMgNR2,并已证明它们在取代环状酮的对映选择性去质子化反应中具有良好的碱性。与其镁双氨基化合物相比,这些新试剂表现出显著不同的反应性和选择性特征,包括对映选择性的意外反转。