The use of the 2-cyanoethyl group for carboxyl-protection is described. This group was readily introduced by esterification using ethylene cyanohydrin and the deprotection was carried out under mild conditions using tetrabutylammonium fluoride in dimethylformamide-tetrahydrofuran.
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
A Convenient Protocol for the Esterification of Carboxylic Acids with Alcohols in the Presence of di-<i>t</i>-Butyl Dicarbonate
作者:Lukas J. Gooßen、Arno Döhring
DOI:10.1055/s-2003-44986
日期:——
Stoichiometric mixtures of carboxylic acids and primary or secondary alkyl alcohols are cleanly converted into their corresponding esters by treatment with di-t-butyl dicarbonate [(BOC) 2 O] in the presence of catalytic amounts of N,N'-dimethylaminopyridine (DMAP). This convenient procedure provides a general access to a broad variety of esters including those bearing highly sensitive functional groups