Formation of 3H-1,3-benzodiazepines by cycloaddition of 1,3-oxazol-5-ones to 2-phenylbenzazete
Abstract
Cycloaddition of 1,3-oxazol-5-ones (2) to 2-phenybenzazete (1) gives 3H-1,3-benzodiazepines (4) which undergo thermal rearrangement to 3H-indoles.