We report here the peri- and regioselectivity experienced in the 1,3-dipolar cycloaddition of 1,5-benzodiazepine to a nitrile oxide. The crystal structure of the title cycloadduct, C23H18ClN30, shows that the condensation occurs at the N=C double bond at the 1 and 2 positions of the benzodiazepine.
Baouid, A.; Hasnaoui, A.; Lavergne, J.-P., Bulletin des Societes Chimiques Belges, 1996, vol. 105, # 6, p. 339 - 344