Copper(II)‐Catalyzed Aminohalogenation of Alkynyl Carbamates
作者:Sabrina Giofrè、Camilla Loro、Letizia Molteni、Carlo Castellano、Alessandro Contini、Donatella Nava、Gianluigi Broggini、Egle M. Beccalli
DOI:10.1002/ejoc.202100202
日期:2021.3.19
The aminohalogenation reaction of O‐alkynyl carbamates under copper catalysis has been developed. The intramolecular C−N bond formation occurs selectively affording haloalkylidene substituted heterocycles. In the case of α,α‐cyclohexyl‐substituted propargyl carbamate, the alkoxyhalogenation pathway was operative. The mechanism for the two alternative reaction pathways was investigated by modeling the