Merging C–H Activation and Alkene Difunctionalization at Room Temperature: A Palladium-Catalyzed Divergent Synthesis of Indoles and Indolines
作者:Manash Kumar Manna、Asik Hossian、Ranjan Jana
DOI:10.1021/ol5036968
日期:2015.2.6
A palladium-catalyzed 1,2-carboamination through C–H activation at room temperature is reported for the synthesis of 2-arylindoles, and indolines from readily available, inexpensive aryl ureas and vinyl arenes. The reaction initiates with a urea-directed electrophilic ortho palladation, alkene insertion, and β-hydride elimination sequences to provide the Fujiwara–Moritani arylation product. Subsequently
Lateral lithiation and substitution of N'-(2-methylphenyl)-N,N-dimethylurea
作者:Keith Smith、Gamal A. El-Hiti、Sadiq A. Al-Mansury、Mohammed B. Alshammari、Asim A. Balakit
DOI:10.3998/ark.5550190.p008.800
日期:——
Lithiation of N'-(2-methylphenyl)-N,N-dimethylurea with three molar equivalents of tert-butyl- lithium at 40 to 30 C takes place on the nitrogen and on the methyl group at position 2 of the phenyl group. The lithium intermediate thus obtained reacts with a variety of electrophiles to give the corresponding side-chain substituted derivatives in high yields.