114935-91-0Relevant articles and documents
THE FIRST EXAMPLES OF ISOLATED N-UNSUBSTITUTED 1H-1,4-BENZODIAZEPINES
Sashida, Haruki,Kaname, Mamoru,Tsuchiya, Takashi
, p. 4676 - 4679 (2007/10/02)
The photolysis in the presence of sodium methoxide of the 4-azidoquinolines (5a-g) having a carbonyl group or its analogue in the 2- or 8-position resulted in ring expansion to give the stable N-unsubstitued 1H-1,4-benzodiazepines (6a-g).These were assumed to be stabilized by intramolecular hydrogen bonding between the NH and the 2- or 9-acyl groups.It is known that the N-unsubstituted 1H-1,4-benzodiazepines having no acyl group are too unstable to be isolated.KEYWORDS---- 4-azidoquinoline; photolysis; ring expansion; N-unsubstituted 1H-1,4-benzodiazepine; hydrogen bonding