作者:Christian M. Cain、Richard P.C. Cousins、Greg Coumbarides、Nigel S. Simpkins
DOI:10.1016/s0040-4020(01)85435-1
日期:1990.1
A number of chiral secondary amines have been prepared and used as precursors to the corresponding chiral lithium amide bases. Treatment of either cis-2,6-dimethylcyclohexanone or 4-tert-butylcyclohexanone with a chiral lithium amide, followed by electrophilic quench, gives chiral products in up to 88% enantiomeric excess. The results with 4-tert-butylcyclohexanone are in disagreement with an earlier
已经制备了许多手性仲胺并将其用作相应的手性锂酰胺碱的前体。用手性锂酰胺处理顺式2,6-二甲基环己酮或4-叔丁基环己酮,然后进行亲电猝灭,得到手性产物,其对映体过量高达88%。用4-叔丁基环己酮的结果与较早的文献报道不一致,给出较低对映体过量但较高旋光度的产物。