116178-22-4Relevant articles and documents
SYNTHESES OF 1,4-OXAZEPINES, AND THEIR 5-OXO DERIVATIVES FROM 2-PYRIDONES
Kurita, Jyoji,Yoneda, Takeharu,Kakusawa, Naoki,Tsuchiya, Takashi
, p. 3085 - 3088 (2007/10/02)
Thermolysis of the 3-aza-7-oxa- (11) and 3,7-diaza-4-oxotricyclo2,5>heptanes (12), prepared from 2-pyridones via four steps, resulted in valence isomerisation with ring opening to give the novel 1,4-oxazepin-5-ones (14) and 1,4-diazepin-5-ones (15), respectively, which were treated with triethyloxonium tetrafluoroborate to afford the fully unsaturated 1,4-oxazepines (16) and 1,4-diazepines (17), respectively.