PCl<sub>3</sub>-mediated transesterification and aminolysis of <i>tert</i>-butyl esters via acid chloride formation
作者:Xiaofang Wu、Lei Zhou、Fangshao Li、Jing Xiao
DOI:10.1177/1747519820987530
日期:2021.5
A PCl3-mediated conversion of tert-butyl esters into esters and amides in one-pot under air is developed. This novel protocol is highlighted by the synthesis of skeletons of bioactive molecules and gram-scale reactions. Mechanistic studies revealed that this transformation involves the formation of an acid chloride in situ, which is followed by reactions with alcohols or amines to afford the desired
Esters as Acylating Reagent in a Friedel−Crafts Reaction: Indium Tribromide Catalyzed Acylation of Arenes Using Dimethylchlorosilane
作者:Yoshihiro Nishimoto、Srinivasarao Arulananda Babu、Makoto Yasuda、Akio Baba
DOI:10.1021/jo801914x
日期:2008.12.5
The Friedel-Craftsacylation of arenes with esters by dimethylchlorosilane and 10 mol % of indium tribromide has been achieved. The key intermediate RCOOSi(Cl)Me(2) is generated from alkoxy esters with the evolution of the corresponding alkanes. The scope of the alkoxy ester moiety was wide: tert-butyl, benzyl, allyl, and isopropyl esters were successful. In addition, we demonstrated the direct synthesis
Ruthenium-Catalyzed Ester Reductions Applied to Pharmaceutical Intermediates
作者:Youssef Shaalan、Lee Boulton、Craig Jamieson
DOI:10.1021/acs.oprd.0c00410
日期:2020.11.20
Ruthenium pincer complexes were synthesized and used for catalytic esterreductions under mild conditions (∼5 bar of hydrogen). An experimental design approach was used to optimize the conditions for yield, purity, and robustness. Evidence for the catalytically active ruthenium dihydride species is presented. Observed intermediates and side products, as well as time-course data, were used to build
An efficient method for the preparation of tert-butyl esters from benzyl cyanide and tert-butyl hydroperoxide under the metal free condition
作者:Xiuling Chen、Yan Li、Minghu Wu、Haibing Guo、Longqiang Jiang、Jian Wang、Shaofa Sun
DOI:10.1039/c6ra20966a
日期:——
A novel protocol to synthesize tert-butyl estersfrom benzyl cyanides and tert-butyl hydroperoxide has been successfully achieved. In the presence of tert-butyl hydroperoxide, Csp3–H bond oxidation, C–CN bond cleavage and C–O bond formation proceeded smoothly in one pot under the metal-free condition.
Disclosed herein are compounds of Formula (I) that include a sulfonate ester, ester or ether group. Compounds of Formula (I) can be included in pharmaceutical compositions, and can be used to treating and/or ameliorating a disease or condition, such as cancer, a microbial disease and/or inflammation.