Cinnolines. Part XVI. Photochemical rearrangement of 2-alkylcinnolinium-4-olates to 3-alkyl-4(3H)-quinazolones
Abstract
This rearrangement occurs in good yield on irradiation of ethanolic solutions, but 2-methylcinnolinium-4-thiolate, 1-methyl-4(1H)-cinnolone, and 2-methyl-3(2H)-cinnolone do not react.