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A Selected set of 2-(quinolin-2-yl)-1,3-oxazepino[7,6- b ]indoles  4a–d  and dihydroacenaphtho[1,2- f ][1,3]oxazepine  5  have been prepared   via  1,4-dipolar cycloaddition reaction involving 1-phenylimidazo[1,5- a ]quinoline, dimethyl acetylenedicarboxylate, and  N -(substituted)isatins or acenaphthoquinone. Structures of the new heterocycles  4a–d  and  5  are supported by NMR and HRMS spectral data, and confirmed by single-crystal X-ray crystallography for  4c  and  5 .

Utilization of 1-phenylimidazo[1,5- a ]quinoline as partner in 1,4-dipolar cycloaddition reactions