Synthesis of medium-sized bicyclic compounds by intramolecular cyclization of cyclic β-keto radicals generated from cyclopropanols using manganese(III) tris(pyridine-2-carboxylate) and its application to total synthesis of 10-isothiocyanatoguaia-6-ene

Article abstract of DOI:10.1246/bcsj.72.85

Bicyclic cyclopropanols having an olefinic side chain are oxidized-with manganese(III) tris(pyridine-2-carboxylate) to generate cyclic β-keto radicals with ring-expansion. These cyclize intramolecularly, affording bicyclic radical intermediates. The cycli