Experimental and theoretical studies on the effect of the oxo group in 1,4-benzodiazepines
作者:Pablo Pertejo、María García-Valverde、Pablo Peña、Nicolás A. Cordero、Tomás Torroba、Alfonso González-Ortega
DOI:10.1039/c4ob00444b
日期:——
5-dihydro-3H-benzo[e][1,4]diazepines, have been synthesized through a similar Ugi/reduction cyclization sequence. Their conformation and stability depend on the position of the tautomeric imine/enamine equilibrium present in the diazepine nucleus, which in turn depends on the relative position of the carbonyl group adjacent to the nitrogen at the 4-position in the benzodiazepine system. Moreover, the electrophilic