A new route to 1,3-benzoxazepines and 1,3-benzodiazepines via intramolecular aza-Wittig reaction
- 1 January 1992
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Chemical Communications
- No. 2,p. 81-82
- https://doi.org/10.1039/c39920000081
Abstract
The reaction of triphenylphosphine with the o-acyloxy-5 and o-acylamino-azidocinnamates 9, prepared from salicylaldehyde and o-aminobenzaldehyde, results in ring closure to give the 1,3-benzoxazepines 7 and 1,3-benzodiazepines 12,via the intramolecular aza-Wittig reaction of the iminophosphoranes 6 and 10 initially formed, respectively.Keywords
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