in ethanol T=78°C; 2 h;

in 1,2-dichloro-benzene T=160°C; 8 h; p-methoxy- and p-nitro-substituted β-tetrazolyl-trans-benzalacetophenones; effect of solvent (benzene, EtOH, aq. EtOH, CH3COOH, CF3COOH, pyridine) and other reagents (PPh3, copper); Product distribution;

triphenylphosphine in 1,2-dichloro-benzene T=160°C; 8 h;

in pyridine T=160°C; 6 h;