<i>C</i>-Methylenation of anilines and indoles with CO<sub>2</sub> and hydrosilane using a pentanuclear zinc complex catalyst
作者:Kazuto Takaishi、Hiroyasu Kosugi、Ritsuki Nishimura、Yuya Yamada、Tadashi Ema
DOI:10.1039/d1cc03675k
日期:——
The one-step C-methylenation of anilines and indoles with CO2 and phenylsilane was catalyzed by a pentanuclear ZnII complex to give diarylmethanes via geminal C–H and C–C bond formation. It is proposed that the zinc–hydride complex generated in situ is a catalytically active species and that bis(silyl)acetal is a key intermediate. When aniline was used as a substrate, both the C-methylenation and N-methylation
Deoxygenative CO<sub>2</sub> conversions with triphenylborane and phenylsilane in the presence of secondary amines or nitrogen-containing aromatics
作者:Takumi Murata、Mahoko Hiyoshi、Shinsuke Maekawa、Yuta Saiki、Manussada Ratanasak、Jun-ya Hasegawa、Tadashi Ema
DOI:10.1039/d1gc04599g
日期:——
BPh3 catalyzed the N-methylation of secondary amines and the C-methylenation (methylene-bridge formation between aromatic rings) of N,N-dimethylanilines or 1-methylindoles in the presence of CO2 (1 atm) and PhSiH3 without solvent at 30–40 °C. A cascade reaction from 1-methyl-2-oxindole to 3,3′-methylenebis(1-methylindole) via 1-methylindole also proceeded.