Calculation of the pKa values of alcohols from .sigma. constants and from the carbonyl frequencies of their esters
作者:Sho Takahashi、Louis Arthur Cohen、Harold K. Miller、Evelyn G. Peake
DOI:10.1021/jo00808a010
日期:1971.5
The Ireland–Claisen rearrangement as a probe for the diastereoselectivity of nucleophilic attack on a double bond adjacent to a stereogenic centre carrying a silyl group
作者:Mark S. Betson、Ian Fleming
DOI:10.1039/b305881f
日期:——
4-R-4-dimethyl(phenyl)silylbut-2-enyl acetate (R = Me and Pr(i)) undergo Ireland-Claisen rearrangements largely in the same stereochemical sense, with C-C bond formation taking place anti to the silyl group in the conformations 22, 23 and 24 in which the hydrogen atom on the stereogenic centre is inside, more or less eclipsing the doublebond. The E-silyl enol ether E-7a derived from 4-methyl-4-dimethyl(phenyl)silylbut-2-enyl