Mechanically induced solvent-free esterification method at room temperature
作者:Lei Zheng、Chen Sun、Wenhao Xu、Alexandr V. Dushkin、Nikolay Polyakov、Weike Su、Jingbo Yu
DOI:10.1039/d0ra09437d
日期:——
Herein, we describe two novel strategies for the synthesis of esters, as achieved under high-speed ball-milling (HSBM) conditions at room temperature. In the presence of I2 and KH2PO2, the reactions afford the desired esterification derivatives in 45% to 91% yields within 20 min of grinding. Meanwhile, using KI and P(OEt)3, esterification products can be obtained in 24% to 85% yields after 60 min of
Visible-Light-Triggered Direct Benzoyloxylation of Electron-Rich Arenes at Room Temperature without Chelation Assistance
作者:Honghua Rao、Ping Wang、Chao-Jun Li
DOI:10.1002/ejoc.201201093
日期:2012.10.18
A RuII photocatalytic method was developed for the direct mono-benzoyloxylation of electron-rich aromatic and heteroaromatic systems even with an excess amount of benzoyl peroxide. The reaction was conducted at roomtemperature under visible light. The direct ArC–H benzoyloxylations occur without the assistance of any directing groups and can also tolerate various functional groups that have already