Microwave assisted C–S cross-coupling reaction from thiols and 2-(4-bromo phenyl)-benzothiazole employed by CuI in acetonitrile
作者:Ramesh Katla、Rakhi Katla
DOI:10.1039/d2nj02065c
日期:——
A microwave assisted C–S and C–Se cross-coupling reaction was carried out in acetonitrile employing commercially available, low-cost CuI as the catalyst. A variety of substrates, including aryl, aliphatic, and heteroaryl thiols, were reacted with 2-(4-bromo phenyl)-benzothiazole, in acetonitrile using K2CO3 as the base under microwave assisted conditions at 80 °C, 200 W (100 psi) for 25–35 min, affording
使用市售的低成本 CuI 作为催化剂,在乙腈中进行微波辅助 C-S 和 C-Se 交叉偶联反应。各种底物,包括芳基、脂肪族和杂芳基硫醇,在 80 °C、200 W 微波辅助条件下,在乙腈中以 K 2 CO 3为碱,与 2-(4-溴苯基)-苯并噻唑反应( 100 psi) 25-35 分钟,以良好至极好的产量提供所需的产品。这是一种新颖的方法,我们合成了一系列 17 种新的交叉耦合 C-S 和 C-Se 分子。
XantPhos Pd-G3 as an Efficient Catalyst: Microwave-Assisted C–S Cross-Coupling Reaction in DMF
作者:Rakhi Katla、Ramesh Katla、Nelson L. C. Domingues
DOI:10.1055/a-1976-4931
日期:2023.3
C–S cross-coupling reaction involving 2-(4-bromophenyl)benzothiazole or 5-bromo-2,1,3-benzothiadiazole with various benzenethiols in DMF, K2CO3 as a base, under microwave irradiation at 80 °C, 200 W. Good to excellent yields of the desired products were obtained under microwave conditions. Other significant benefits of this synthetic approach are low catalyst loading, short reaction times, and eco-friendly
Buchwald 预催化剂 (XantPhos Pd-G3) 首次用于 2-(4-溴苯基) 苯并噻唑或 5-溴-2,1,3-苯并噻二唑与各种苯硫醇在 DMF 中的 C-S 交叉偶联反应, K 2 CO 3为碱,在80℃、200W的微波辐射下。在微波条件下获得了良好至优异收率的所需产物。这种合成方法的其他显着优点是催化剂负载低、反应时间短和环境友好的条件。此外,还成功合成了 29 种化合物,其中一些是本协议中的新化合物。