No abstract

No abstract

4-Phenyl-1H-1,5-benzodiazepin-2(3H)-one reacts in the pres­ence of a concentrated aqueous solution of sodium hydroxide and a quaternary ammonium salt (as catalyst) in benzene (phase transfer catalysis) with propargyl bromide, affording the title benzodiazepine derivative, C18H14N2O. In the mol­ecule, the mean plane of the propargyl substituent is almost perpendicular with that of the amide group [dihedral angle = 87.81 (8)°]. In the crystal, the molecules are linked by C—H⋯O and C—H⋯N inter­actions.

Condensation of N‐p‐nitrophenyl‐C‐ethoxycarbonylnitril­im­ine with 2‐methylthio‐4‐phenyl‐3H‐1,5‐benzodiazepine leads to the title compound, C26H23N5O4S. It has been established that 1,3‐dipolar cycloaddition occurs on the C4 =N5 double bond of the 1,5‐benzodiazepine.