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The reaction of 1,5-dibenzyl-3-propargyl-1,5-benzodiazepine-2,4-dione with ethyl azido­acetate in the presence of copper sulfate pentahydrate and sodium ascorbate leads to the formation of the title regioisomer, C 30 H 29 N 5 O 4 , which features a phenyl­ene ring fused with a seven-membered diazepinyl ring. The latter ring adopts a boat conformation (with the methyl­triazolylacetate-bearing C atom as the prow and the fused-ring C atoms as the stern). The benzyl groups connected to the diazepinyl ring jprotrude from the sides; the methyl­triazolylacetate substituent occupies an axial position.

Ethyl 2-{4-[(1,5-dibenzyl-2,4-dioxo-2,3,4,5-tetrahydro-1H-1,5-benzodiazepin-3-yl)methyl]-1H-1,2,3-triazol-1-yl}acetate