Resumen:
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Homogeneous and heterogeneous flash vacuum pyrolysis (fvp) reactions of 2-(1H-1,2,3-benzotriazol-1-yl)-phenylethanone are reported. Heterogeneous reactions were carried out using Al-MCM-41 catalysts, mesoporous molecular sieves of the type M41S. In both cases 7H-dibenzo[b,d]azepin-7-one (4) was the major product, however in the catalytic reactions, yields and selectivity were very high. A mechanism for this reaction is discussed.