A novel photochemical synthesis of 5, 6-dihydro-4 H-1, 2-oxazines by DCA-sensitized irradiation of γδ-unsaturated oximes

…, OJ Griffiths, WM Horspool, M Carpintero

Index: Armesto, Diego; Austin, Mark A.; Griffiths, Owain J.; Horspool, William M.; Carpintero, Mercedes Chemical Communications, 1996 , # 24 p. 2715 - 2716

Full Text: HTML

Citation Number: 4

Abstract

On DCA-sensitized irradiation 6, 6-diphenylhex-5-en-2-one oxime 5a, 5, 5-diphenylpent-4- enal oxime 5b and 2, 2-dimethyl-5-phenylpent-4-enal oxime 5c undergo a novel photochemical cyclization yielding 3-methyl-6-diphenylmethyl-5, 6-dihydro-4H-1, 2-oxazine 9a, 6-diphenylmethyl-5, 6-dihydro-4H-1, 2-oxazine 9b and 6-benzyl-4, 4-dimethyl-5, 6- dihydro-4H-1, 2-oxazine 9c, respectively.