96794-10-4Relevant articles and documents
Mixed oxides as highly selective catalysts for the flash pyrolysis of phenacyl benzotriazole: One-pot synthesis of dibenzazepin-7-one
Lener, German,Carbonio, Raul E.,Moyano, E. Laura
, p. 1020 - 1025 (2013/07/25)
The one-pot synthesis of dibenzo[b,d]azepin-7-one (3) was selectively achieved from 1-phenacyl-1,2,3-benzotriazole (1) using the catalytic flash vacuum pyrolysis (cfvp) methodology. Catalysts with the scheelite structure ABO4 (A = Ca2+, Sr2+, Ba2+ and B = Mo6+, W6+) and fergusonite BiVO4 were explored in this new catalytic reaction. These oxides promoted high conversion of starting material at lower temperatures than those observed for noncatalytic reactions. The chemical nature of A and B cations in the scheelite structure showed a strong influence on the formation toward the desired azepinone. In addition, the catalyst's morphology had a significant influence on the course of the cfvp reaction.
Catalytic flash vacuum pyrolysis (CFVP): A new way to afford 7H-dibenzo[b,d]azepin-7-one
Moyano, Elizabeth L.,Eimer, Griselda A.,Lucero, Paola L.,Chanquia, Corina M.,Herrero, Eduardo R.,Yranzo, Gloria I.
scheme or table, p. 98 - 103 (2010/10/02)
Catalytic flash vacuum pyrolysis (cfvp) of 2-(1H-1,2,3-benzotriazol-1-yl)-phenylethanone (1) was performed over different mesoporous solids of the MCM-41 type: pure Si-MCM-41, Al-MCM-41 and Ti-MCM-41 with Si/metal ratio equal to 20 and 120. While in the absence of the catalyst (conventional fvp) the thermal reaction afforded 7H-dibenzo[b,d]azepin-7-one (5) as the main product between 400 and 500 °C, in the cfvp systems different products were obtained between 350 and 450 °C depending on the type of catalysts. Al-MCM-41 showed the best catalytic performance with azepinone selectivity of 87% at 450 °C. The mechanisms of formation of these different products as well as the effect of different solids are discussed. Mesoporous materials used in this study have been prepared by direct hydrothermal synthesis. Structural regularity was determined by XRD and highly ordered structures were obtained.
One-pot synthesis of 7H-dibenzo[b,d]azepin-7-one by heterogeneous flash vacuum pyrolysis with MCM-41 catalysts
Moyano, Elizabeth L.,Lucero, Paola L.,Eimer, Griselda A.,Herrero, Eduardo R.,Yranzo, Gloria I.
, p. 2179 - 2181 (2008/02/03)
Homogeneous and heterogeneous flash vacuum pyrolysis (fvp) reactions of 2-(1H-1,2,3-benzo1riazol-1-yl)phenylethanone (1) are reported. Heterogeneous reactions were carried out with 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 also discussed.
