Regiochemical aspects in the reaction of 2,3,5-tri-o-benzoyl-d-ribofuranosyl
作者:Yayoi S. Yokoyma、M.R.H. Elmoghayar、Isao Kuwajima
DOI:10.1016/s0040-4039(00)87428-6
日期:1982.1
In the reaction with silyl enol ethers catalyzed by stannicchloride, 2,3,5-tri-O-benzoyl-D-ribofuranosyl acetate behaves as an ambident electrophile; silyl enol ethers of ketones having α-hetero substituents afford C-1 adducts, whereas those of usual acyclic ketones give products arising from attack on C-2 benzoxyl group.
Reactions of 2,3,5-Tri-<i>O</i>-benzoyl-D-ribofuranosyl Acetate with Enol Silyl Ethers Catalyzed by Tin(IV) Chloride. Regiochemical Features
作者:Yayoi S. Yokoyama、Tan Inoue、Isao Kuwajima
DOI:10.1246/bcsj.57.553
日期:1984.2
condensation reactions of 2,3,5-tri-O-benzoyl-D-ribofuranosyl acetate with various kinds of enol silyl ethers in the presence of tin(IV) chloride, the acetate behaves as an ambident electrophile to give two types of products arising from nucleophilic attack of the enol ether on C-1 carbon of the ribose derivative and on carbonyl carbon of 2-benzoyloxyl group, depending remarkably on the enol silyl ethers