Reinvestigation of synthetic routes to 1,3,4-benzoxadiazepin-5-ones and 1,3-benzoxazepines

Article abstract of DOI:10.1055/s-1994-25701

Recently reported syntheses of 1,3-benzoxazepines and 1,3,4-benzoxadiazepin-5-ones were reinvestigated and found to produce, instead, 2-(2-hydroxyphenyl)-1,3,4-oxadiazoles and 5-(2-hydroxyphenyl)-1,3-oxazoles, respectively.