Silver/manganese dioxide nanorod catalyzed hydrogen-borrowing reactions and <i>tert</i>-butyl ester synthesis
作者:Huanhuan Luo、Yike Yang、Bobin Yang、Zhaojun Xu、Dawei Wang
DOI:10.1177/1747519821989963
日期:2021.7
hydrogen-borrowing reactions in high yields and are also effective for the synthesis of tert-butylesters from aryl cyanides and tert-butyl hydroperoxide in a short period of time. Mechanistic experiments revealed that this catalytic system acts as a Lewis acid in hydrogen-borrowing reactions, while the synthesis of tert-butylesters occurs through a radical pathway. This is the first report on the excellent catalytic
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
rings: Treatment of N‐arylallylamine with an aryl or alkenylhalide under palladium catalysis (see scheme; dba=dibenzylideneacetone, SPhos=2‐dicyclohexylphosphanyl‐2′,6′‐dimethoxybiphenyl) resulted in intramolecular cyclization to form the arylmethyl‐substituted aziridine with concomitant CC bond formation. The experiments for the elucidation of the reaction mechanism are also described.
A mesoporous organosilica grafted Pd catalyst (MOG-Pd) for efficient base free and phosphine free synthesis of tertiary butyl esters via tertiary-butoxycarbonylation of boronic acid derivatives without using carbon monoxide
作者:Kajari Ghosh、Rostam Ali Molla、Md. Asif Iqubal、S. M. Islam
DOI:10.1039/c4gc02443e
日期:——
A reusable MOG-Pd catalyst has been synthesized, characterized and it shows high efficiency in tert-butoxycarbonylation under green condition.
已合成、表征并展示出在绿色条件下对叔丁氧羰基化反应具有高效性能的可重复使用的MOG-Pd催化剂。
One-pot esterification and Ritter reaction: chemo- and regioselectivity from tert-butyl methyl ether
作者:Pankaj Dawar、M. Bhagavan Raju、Ramesha A. Ramakrishna
DOI:10.1016/j.tetlet.2011.04.100
日期:2011.8
tert-Butylmethyl ether (TBME) has been effectively used as a reagent for esterification of carboxylic acids. By varying amounts of sulfuric acid, a remarkable regioselectivity in esterification has been demonstrated. Additionally, under the present reaction conditions, one-pot esterification and Ritter reaction are achieved in almost quantitative yield.