Synthesis of 2-substituted bicyclo[1.1.0]butanes via zincocyclopropanation using bromoform as the carbenoid precursor.

Through a revisited Simmons-Smith type zincocyclopropanation using bromoform as the carbenoid source, the synthesis of 2-, 2,2- and 2,4-substituted bicyclo[1.1.0]butanes is reported. Few antecedents of the derivatives have yet been described. Ultimately, the underexplored scaffolds exhibited a complete discrepency of reactivity.