An efficient regioselective synthesis of tetrasubstituted 3imidazolines under organo-photocatalytic conditions has been developed through formal [3 + 2]-cycloaddition between 2Hazirines and N-tosyl benzylidene imines. The products were isolated in high yields and as a separable mixture of diaster-eoisomers in most of the cases. The mild reaction conditions employing an organic dye as photocatalyst, excellent functional group tolerance, and high regioselectivity are notable features of the current protocol.

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