J. Press, N. Eudy
Oct 1, 1981
Citations
0
Influential Citations
3
Citations
Journal
Journal of Heterocyclic Chemistry
Abstract
7-Bromothieno[3,4-b][1,5]benzoxazepin-10-one (1a) was unexpectedly formed upon acid catalyzed ring closure of 5-bromo-4-ethoxy-2′-hydroxy-3-thiophenecarboxanilide (2a). Ring closure of the chlorine analogue 2c proceeded normally to give 3-chlorothieno[3,4-b][1,5]benzoxazepin-10-one (1b).