Formation of Carbon–Sulfur and Carbon–Selenium Bonds by Palladium-Catalyzed Decarboxylative Cross-Couplings of Hindered 2,6-Dialkoxybenzoic Acids
作者:Jean-Michel Becht、Claude Le Drian
DOI:10.1021/jo200344w
日期:2011.8.5
using a decarboxylativepalladium-catalyzed reaction between electron-rich 2,6-dialkoxybenzoic acid derivatives and diaryl disulfides is reported. This coupling proceeds efficiently in the presence of Pd(CF3CO2)2 and Ag2CO3 in a 65:1 mixture of 1,4-dioxane and tetramethylene sulfoxide (TMSO). We present also the first formation of a carbon–selenium bond via a palladium-catalyzeddecarboxylative cross-coupling
据报道,在富电子的2,6-二烷氧基苯甲酸衍生物和二芳基二硫化物之间进行脱羧钯催化反应,可轻松制得二芳基硫化物。在Pd(CF 3 CO 2)2和Ag 2 CO 3在1,4-二恶烷和四亚甲基亚砜(TMSO)的65:1混合物中存在时,该偶联有效地进行。我们还介绍了通过钯催化的脱羧交叉偶联的碳-硒键的首次形成。
N-Chlorosuccinimide promoted direct C(sp2)–H bond thiolation of the methoxybenzenes with thiophenols
A simple and an efficient procedure for the formation of diaryl sulfides via direct sp2 C–H functionalization have been developed from simple and readily available thiophenols and substituted methoxy benzenes. In this process thiophenols were used as the sulfur source. In this transformation broad range of functional groups were well tolerated in good to excellent yields.