A palladium-catalyzed, iodine-mediatedelectrophilicannulation between 2-(1-alkynyl)biphenyl and disulfide has been developed. With the combination of PdCl2 and I2, a variety of 2-(1-alkynyl)biphenyls underwent electrophilicannulations with various disulfides successfully to afford the corresponding 9-sulfenyl phenanthrenes in moderate to excellent yields.
Iodine-catalyzed, highly atom-economic synthesis of 9-sulfenylphenanthrenes and polycyclic heteroaromatics in water
作者:Nilanjana Mukherjee、Tanmay Chatterjee
DOI:10.1039/d1gc03305k
日期:——
A highly atom-economical and green synthetic method is developed for the oxidative thiolative annulation of 2-alkynyl biaryls with disulfides to synthesize a wide variety of 9-sulfenylphenanthrenes and polycyclic heteroaromatics in water. The transformation requires only a couple of inexpensive reagents, i.e., iodine as a catalyst and hydrogen peroxide (H2O2) as a green oxidant, to furnish the desired