作者:Paula M. Tomlin、David J. Davies、Martin D. Smith
DOI:10.1016/j.tetasy.2009.03.020
日期:2009.5
This paper describes studies on the feasibility of an asymmetric Favorskii rearrangement of a meso-dihaloketone substrate. In the racemic series, metal amide bases in the presence of amines give poor to reasonable yields of ring-contracted unsaturated cyclopentyl amides, whilst amines in aqueous solvent mixtures afford cyclopentyl amides in good to excellent yields. A range of chiral non-racemic amines
本文描述了在的不对称法沃尔斯基重排反应的可行性研究内消旋dihaloketone衬底。在外消旋系列中,在胺存在下的金属酰胺碱使环缩合的不饱和环戊基酰胺的收率不佳至合理,而在水性溶剂混合物中的胺以良好或优异的收率提供环戊基酰胺。筛选了一系列手性非外消旋胺,观察到微小的非对映体偏倚,并提出了非对映选择性过程的初步机理原理。