Metal-Free Thiocyanation of Imidazoheterocycles through Visible Light Photoredox Catalysis. 2015

Shubhanjan Mitra, and Monoranjan Ghosh, and Subhajit Mishra, and Alakananda Hajra
Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India.

A visible light mediated, metal-free process for the thiocyanation of imidazoheterocycles has been developed using eosin Y as a photoredox catalyst under ambient air at room temperature. A library of 3-(thiocyanato)imidazo[1,2-a]pyridines with broad functionalities have been synthesized in high yields. This methodology is also applicable for the selenocyanation of imidazo[1,2-a]pyridine.

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