The photolysis of 2-benzyloxy-4-methoxybenzophenone produced 2,3-diphenyl-6-methoxybenzofuran presumably via internal hydrogen transfer in the excited state followed by cyclization of the resulting diradical.
G. R. Lappin and J. S. Zannucci, J. Chem. Soc. D, 1969, 1113a DOI: 10.1039/C2969001113A
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