Asymmetric deprotonation of prochiral ketones using chiral lithium amide bases
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 chirallithiumamidebases. Treatment of either cis-2,6-dimethylcyclohexanone or 4-tert-butylcyclohexanone with a chirallithiumamide, 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
Asymmetric deprotonation: a new route to chiral compounds
作者:Nigel S. Simpkins
DOI:10.1039/c39860000088
日期:——
Enantioselective deprotonation of symmetrically substituted ketones under kinetically controlled conditions provides chiral products in up to 74% enantiomeric excess.
在动力学控制的条件下,对称取代的酮的对映选择性去质子化可提供高达74%对映体过量的手性产物。
KIM, NEE-DOO;SHIRAI, RYUICHI;KAWASAKI, HISASHI;NAKAJIMA, NAKOTO;KOGA, KEN+, HETEROCYCLES, 30,(1990) N, C. 307-310