Ring Expansion through Photocycloaddition -- β-Scission Sequence. Two Carbon Ring Expansions of β-Indanone and β-Tetralone

Article abstract of DOI:10.1246/cl.1987.1527

We describe a new method for two carbon ring expansions of 5- and 6-membered rings of β-indanone and β-tetralone through the <2+2> photocycloaddition of the enol ethers of the cyclic ketones followed by the radical cleavage of the fused bond of the cyclob