Synthesis of Acyl Carbamates via Four Component Pd-Catalyzed Carbonylative Coupling of Aryl Halides, Potassium Cyanate, and Alcohols
作者:Hongfei Yin、Angelina M. de Almeida、Mauro V. de Almeida、Anders T. Lindhardt、Troels Skrydstrup
DOI:10.1021/acs.orglett.5b00221
日期:2015.3.6
base-free four-component Pd-catalyzed carbonylation of arylhalides in the presence of potassium cyanate and alcohols in a two-chamber system. This approach produces a wide range of aryl acyl carbamates in good to excellent yields from the corresponding aryl bromides or iodides with near-stoichiometric carbon monoxide. In addition, the method can be extended to the synthesis of primary amides thereby
Enabling the facile conversion of acyl hydrazides into N-acyl carbamates via metal-free ionic-based rupture of the N–N linkage
作者:André Shamsabadi、Jack Ren、Vijay Chudasama
DOI:10.1039/c7ra04178k
日期:——
the one-pot transformation of readily synthesised/easily accessed acyl hydrazides into N-acyl carbamatesvia an alkylation-elimination reaction sequence. A range of N-acyl carbamates are prepared in consistent yields, including those featuring protectinggroups and having alkyl & aryl N-acyl functionality. The reaction conditions also tolerate a wide variety of sensitive functional groups.