Table 1.

Synthesis of 1,4-diazepine and 1,5-benzodiazepine derivatives using CF₃COOH as catalyst under reflux conditions.

Compounds	R	Ratio of aldehyde	CF3COOH Times (min) / Yields (%)
	4a	C6H5	1.5	420/60
4b	p-CH3C6H5	1.5	420/55
4c	p-ClC6H5	2.5	360/64
4d	p-BrC6H5	2.5	360/69
5a	C6H5	1.5	360/79
5b	p-CH3C6H5	1.5	420/83
5c	p-ClC6H5	3	720/64
5d	p-BrC6H5	3	720/74