A simple, quick and cost effective protocol is presented herein for the sustainable synthesis of 2-(N-arylamino)benzothiazoles from 2-haloanilines and arylisothiocyanates by using an ionic liquid supported heterogeneous Cu(II) catalyst derived from N-methylimidazole. While comparing the usage of homogeneous catalyst with additives, longer reaction time and high reaction temperature this methodology exhibits broad substrate scope and quick reaction times afford compounds in excellent yields under microwaves. In addition, the catalyst can be extracted easily and is recyclable up to five times with no noteworthy loss in catalytic activity.