A facile and efficient [4 + 2] annulation reaction of sulfur ylides: access to N-fused benzimidazoles?

Organic Chemistry Frontiers Pub Date: 2018-12-07 DOI: 10.1039/C8QO01133H

Abstract

A facile and efficient approach to synthesize a series of new N-fused benzimidazoles in good yield is reported for the first time using the [4 + 2] cascade cycloaddition of 2-substituted benzimidazole derivatives and a bromoethylsulfonium salt, which is easily prepared on a large scale and is stably crystalline, under mild reaction conditions.

Graphical abstract: A facile and efficient [4 + 2] annulation reaction of sulfur ylides: access to N-fused benzimidazoles
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