Dual Ligand-Enabled Nondirected C−H Olefination of Arenes
作者:Hao Chen、Philipp Wedi、Tim Meyer、Ghazal Tavakoli、Manuel van Gemmeren
DOI:10.1002/anie.201712235
日期:2018.2.23
The application of the Pd‐catalyzed oxidative C−H olefination of arenes, also known as the Fujiwara–Moritani reaction, has traditionally been limited by the requirement for directing groups on the substrate or the need to use the arene in large excess, typically as a (co)solvent. Herein the development of a catalytic system is described that, through the combined action of two complementary ligands
Chelation-directed remote <i>meta</i>-C–H functionalization of aromatic aldehydes and ketones
作者:Shuguang Xie、Sen Li、Wenqian Ma、Xiaohua Xu、Zhong Jin
DOI:10.1039/c9cc05807a
日期:——
palladium-catalyzed remote meta-C–H functionalization of aromaticaldehydes and ketones. In situ-generation of acetals and ketals, as well as removal afterwards, makes the C–H bond functionalization process more straightforward and efficient. This also represents the first example of chelation-directed meta-C–H functionalization of aromaticaldehydes and ketones.
Piperazine derivative or its salt, process for producing the same and
申请人:Toyama Chemical Co., Ltd.
公开号:US04948796A1
公开(公告)日:1990-08-14
A piperazine derivative represented by the following formula or a salt thereof: ##STR1## which is useful for curing cerebro-vascular disease and post-cerebro-vascular disease.