Oxazepines and Thiazepines, XXIV Synthesis of Optically Active 2,3-Dihydro-2-methyl-1,5-benzoxazepin-4(5H)-ones
2,3-Dihydro-2(R)-methyl-1,5-benzoxazepin-4(5H)-one and its enantiomer (S)-3 have been synthesized via the optical resolution and subsequent chemical transformations of (+/-)-3-(2-nitrophenoxy)butyric acid (1).Compounds (R)-3 and (S)-3 were convert