A highly useful, visible-light-driven carboxylation of aryl bromides and chlorides with CO2 was realized using a combination of Pd(OAc)2 as a carboxylation catalyst and Ir(ppy)2(dtbpy)(PF6) as a photoredox catalyst. This carboxylation reaction proceeded in high yields under 1 atm of CO2 with a variety of functionalized aryl bromides and chlorides without the necessity of using stoichiometric metallic
使用 Pd(OAc)2 作为羧化催化剂和 Ir(ppy)2(dtbpy)(PF6) 作为光氧化还原催化剂的组合,实现了非常有用的、可见光驱动的芳基溴化物和氯化物与 CO2 的羧化。该羧化反应在 1 个大气压的 CO2 下与各种官能化的芳基溴化物和氯化物以高产率进行,无需使用化学计量的金属还原剂。
Nickel and Chiral Phosphoric Acid Cocatalysis Enables Synthesis of <i>C</i>-Acyl Glycosides
作者:Li Zhang、Wei Zeng、Demeng Xie、Jiangtao Li、Xiaofeng Ma
DOI:10.1021/acs.orglett.3c04159
日期:2024.2.23
Rational Syntheses of Porphyrins Bearing up to Four Different Meso Substituents
作者:Polisetti Dharma Rao、Savithri Dhanalekshmi、Benjamin J. Littler、Jonathan S. Lindsey
DOI:10.1021/jo000882k
日期:2000.11.1
using EtMgBr and an acid chloride has been refined. A new procedure for the preparation of unsymmetrical diacyl dipyrromethanes has been developed that involves (1) monoacylation with EtMgBr and a pyridyl benzothioate followed by (2) introduction of the second acyl unit upon reaction with EtMgBr and an acid chloride. The scope of these acylation methods has been examined by preparing multigram quantities