Acyclic stereoselection. 46. Stereochemistry of the Michael addition of N,N-disubstituted amide and thioamide enolates to .alpha.,.beta.-unsaturated ketones
The design of diastereoselective Mukaiyama-Michael reaction of ketene silyl acetal
作者:Junzo Otera、Yukihiro Fujita、Shunichi Fukuzumi
DOI:10.1016/0040-4020(96)00478-4
日期:1996.7
The highly diastereoselective Mukaiyama-Michaelreaction has been designed. Suppression of an electron-transfer process is crucial for this purpose and the following conditions should be satisfied. (1) TiCl4 is employed as a Lewisacid. (2) Ketenesilylacetals have bulky siloxy and/or alkoxy group(s). (3) α-Enones have a bulky acyl group. The excellent syn-selectivity up to a 99:1 ratio is attained
Acyclic stereoselection. 29. Stereoselection in the Michael addition reaction. 1. The Mukaiyama-Michael reaction
作者:Clayton H. Heathcock、Mark H. Norman、David E. Uehling
DOI:10.1021/ja00295a037
日期:1985.5
Acyclic stereoselection. 46. Stereochemistry of the Michael addition of N,N-disubstituted amide and thioamide enolates to .alpha.,.beta.-unsaturated ketones
作者:David A. Oare、Mark A. Henderson、Mark A. Sanner、Clayton H. Heathcock
DOI:10.1021/jo00288a027
日期:1990.1
Acyclic stereoselection. 47. Stereochemistry of the Michael addition of ester and ketone enolates to .alpha.,.beta.-unsaturated ketones