Arylamines are important pharmaceutical intermediates among other numerous applications. Herein, an environmentally benign route and novel approach to arylaminesynthesis using dehydrative amination of phenols with amines and styrene under continuous‐flow conditions was developed. Inexpensive and readily available phenols were efficiently converted into the corresponding arylamines, with small amounts
Development of a Method for the <i>N</i>-Arylation of Amino Acid Esters with Aryl Triflates
作者:Sandra M. King、Stephen L. Buchwald
DOI:10.1021/acs.orglett.6b02082
日期:2016.8.19
N-arylation of aminoacidesters with aryl triflates is described. Both α- and β-amino acidesters, including methyl, tert-butyl, and benzyl esters, are viable substrates. Reaction optimization was carried out by design of experiment (DOE) analysis using JMP software. The mild reaction conditions, which use t-BuBrettPhos Pd G3 or G4 precatalyst, result in minimal racemization of the aminoacidester. This method
importance of polyfunctional amines, C–N bond formation is important in synthetic organic chemistry. Here we present a neutral amination reaction using azides as the nitrogen source and arylboronic acids with a rhodium(I) catalyst to afford alkyl–aryl and aryl–aryl secondary amines. Natural products and pharmaceutical derivatives were applied, and gram-scale reactions were performed, which demonstrated the