Cycloaddition of N-arylketenimines to thiobenzophenones. Formation of 4H-3,1-benzothiazine and 2-iminothietan derivatives
- 1 January 1977
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Chemical Communications
- No. 2,p. 43-44
- https://doi.org/10.1039/c39770000043
Abstract
N-p-Tolyl and N-phenylketenimines (1) react with thiobenzophenones (2) by a formal 4+ 2 cycloaddition to give substituted 4H-3,1-benzothiazines (4) whose structures have been confirmed by an X-ray diffraction study, whereas the N-mesitylketenimine (5) leads to the 2-iminothietan (6) by a 2 + 2 cycloaddition.Keywords
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