CYCLOPROPYLPHENYLCARBENE-THERMAL CONTROL OF INTERMOLECULAR ADDITION

Article abstract of DOI:10.1016/S0040-4039(01)82849-5

At 25deg C, photolytically generated cyclopropylphenylcarbene affords phenylcyclobutene (63percent, by ring expansion), phenylacetylene (16percent, by fragmentation), and only traces (<3percent) of the adduct to isobutene; at lower temperatures, however, the latter compound becomes the major product.