Acylation of alcohols and amides was effected under mild conditions by the use of 1,1′-dimethylstannocene and acylchlorides, giving the corresponding esters and imides in good to excellent yields.
Zincperchloratehexahydrate, Zn(ClO4)2⋅6H2O, efficientlycatalyses the esterification between nearly equimolar amounts of carboxylicacids and alcohols. The reaction works under solvent-free conditions at relatively low temperatures. Excellent results were obtained with a wide range of substrates.
Lipase-mediated desymmetrization of glycerol with aromatic and aliphatic anhydrides
作者:Daniela I. Batovska、Shuichirou Tsubota、Yasuo Kato、Yasuhisa Asano、Makoto Ubukata
DOI:10.1016/j.tetasy.2004.09.033
日期:2004.11
Chirazyme L-2 (Candida antarctica) catalyzed esterification of glycerol with aromatic and aliphatic anhydrides in 1,4-dioxane is described. All the aromatic monoacylglycerols (MAGs) were produced as (R)-enantiomers, while aliphatic MAGs were obtained either as racemic mixtures or the (S)-enantiomers. The influence of substituted aromatic rings, chain length, and presence of a conjugated double bond in the acyl donor moiety on the enantiotopic selectivity as well as the efficiency of the enzyme was studied. (C) 2004 Elsevier Ltd. All rights reserved.
MUKAIYAMA, TERUAKI;ICHIKAWA, JUNJI;ASAMI, MASATOSHI, CHEM. LETT., 1983, N 3, 293-296
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