The intermolecular C–C, C–O, C–S and C–N bonds construction between diazo compounds and acyclic, cyclic 1,3-dicarbonyl compounds, thiophenol, alkynes were developed by using a TFMSA@SBA-15, providing a metal-free and eco-friendly platform.
activity. An easy and highly efficient approach to sulfur-containing compounds, by S–H insertion reactions of α-keto esters with thiols, is reported. The substrate scope was remarkably wide, affording the corresponding products in up to 97% yield. Overall, the raw materials were readily available and the reaction conditions were mild in this synthetic method.
A stable Copper-Modified silica microsphere catalyst for the synthesis of N-substituted carbazoles and organosilanes
作者:Haodong Xie、Qian Ma、Yuzhi Wang、Yiming Sun、Jonathan B. Baell、Fei Huang、Yang Yu
DOI:10.1016/j.jcat.2024.115294
日期:2024.1
various transformations and are applied broadly in the synthesis of complex molecules and drug. Typically, such transformations require expensive metal and complex ligands, leading to a vigorous reaction system and trace metal residues. Herein, we report copper-modified silica microspheres (SM-b) as heterogeneous catalyst in the insertionreaction of diazo compounds with carbazole and silanes. Under
作者:Xuemin Jia、Xiao Ma、Wei Feng、Ji-Quan Zhang、Yonglong Zhao、Bing Guo、Lei Tang、Yuan-Yong Yang
DOI:10.1021/acs.joc.2c02207
日期:2022.12.16
A convenient method was developed for the preparation of thiolated compounds via a DBU-catalyzed aerobic cross-dehydrogenative coupling (CDC) reaction. The established protocol is environmentally friendly and operationally simple. Substrates like (hetero)aryl acetates, (hetero)aryl ketones, and indoles could be transformed into the corresponding thiolated products in moderate to high yields and further