Single and Double Suzuki−Miyaura Couplings with Symmetric Dihalobenzenes
作者:David J. Sinclair、Michael S. Sherburn
DOI:10.1021/jo050105q
日期:2005.4.1
m- or p-diiodobenzene undergoes selective double coupling reactions with arylboronic acids and esters. Selectivity for double coupling over single coupling is remarkably strong: even with a diiodobenzene:monoboronic acid ratio of 10:1, the products of double coupling are formed in good yields. Steric hindrance and electronic influences of the boronic acid or ester, and reaction conditions do not appear to impact significantly upon the outcome of the reaction. In contrast, m- and p-dibromobenzenes undergo single couplings with aryl boronic acids with high selectivity.
Palladium‐Catalyzed Reductive Carbonylation of (Hetero) Aryl Halides and Triflates Using Cobalt Carbonyl as CO Source
作者:Bhushanarao Dogga、C. S. Ananda Kumar、Jayan T. Joseph
DOI:10.1002/ejoc.202001328
日期:2021.1.15
A generalized protocol for the reductive carbonylation of (hetero) aryl halides and triflates under CO gas‐free conditions using Pd/Co2(CO)8 and triethylsilane has been developed. The mild reaction conditions, enhanced safety, and wide substrate scope highlight its importance in routine organic synthesis.
已经开发了一种通用协议,用于在无CO气体条件下使用Pd / Co 2(CO)8和三乙基硅烷对(杂)芳基卤化物和三氟甲磺酸进行还原羰基化。温和的反应条件,增强的安全性和广泛的底物范围突出了其在常规有机合成中的重要性。
Silicon directed ipso-substitution of polymer bound arylsilanes: Preparation of biaryls via the Suzuki cross-coupling reaction
作者:Yongxin Han、Shawn D Walker、Robert N Young
DOI:10.1016/0040-4039(96)00364-4
日期:1996.4
A method for attaching haloarylsilanes to polymer support was developed. The polymerbound arylhalides were reacted with a variety of ArB(OH)2 under the Suzuki cross-coupling reaction conditions and the coupled resins were cleaved by different electrophiles to give ipso-substitution products in good yields.