May 1981 Heterocycles. 9. 2-Aryl-2H-1,4-tetrahydrooxazines (1,2) Donald R. Meyer and Philip M. Weintraub* Merrell Research Center, Merrell-National Laboratories, Division of Richardson-Merrell Inc., Cincinnati, Ohio 45215 Received September 8, 1980 ... Reaction of 2-bromo-1-phenylethanones with diethanolamine gave 2-hydroxymorpholines. Acetylation gave mono or diacetates. Acid catalyzed dehydrations gave several types of products whose ...