One pot Click chemistry: A three component reaction for the synthesis of 2-mercaptobenzimidazole linked coumarinyl triazoles as anti-tubercular agents.

2-Propargylthiobenzimidazole 1, 4-bromomethyl coumarins/1-aza-coumarins 2/3 and sodium azide have been reacted in one pot under Click chemistry conditions to give exclusively 1,4-disubstituted triazoles 5a-n. Anti-tubercular assays against M. tuberculosis (H37Rv) coupled with in silico molecular docking studies indicated that dimethyl substituents 5c and 5d showed promising activity with higher C-score values.