Synthesis and Study of Isomeric Benzo[1,4]oxazines and Benzothiazolines by NMR Spectroscopy and X-Ray Crystallography
作者:Vıctor Santes、Susana Rojas-Lima、Rosa L. Santillan、Norberto Farfán
DOI:10.1007/s007060050307
日期:1999.12
Reaction of 2-aminophenol and 2-aminothiophenol with 1-phenyl-1,2-propanedione yields a mixture of both possible isomeric benzo[1,4]oxazines and benzothiazolines which were characterized by NMR spectroscopy. In addition, the structures for 3-methyl-2-phenyl-2H-benzo[1,4]-oxazin-2-ol and 1-(2-phenyl-2,3-dihydro-benzothiazol-2-yl)-ethanone were established by X-ray diffraction analysis.