Observation of two oxa-azabicyclo[2.2.0]hexenone intermediates along the reaction pathway of the photochemical isomerization of 1,3-oxazin-6-ones
- 1 August 1981
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Chemistry
- Vol. 59 (15) , 2328-2333
- https://doi.org/10.1139/v81-336
Abstract
Irradiation of 4-methyl-2-phenyl-1,3-oxazin-6-one, 1, yields a photochemical equilibrium between 1 and 2-methyl-4-phenyl-1,3-oxazin-6-one, 2. The isomerization proceeds through two intermediates, the oxa-azabicyclo[2.2.0]hexenones 3 and 4, both of which can be observed spectroscopically (ir, uv, 1H nmr) at low temperature.Keywords
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