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Catalytic flash vacuum pyrolysis (CFVP): A new way to afford 7H-dibenzo[b,d]azepin-7-one

Paper ID Volume ID Publish Year Pages File Format Full-Text
42230 45916 2010 6 PDF Available
Title
Catalytic flash vacuum pyrolysis (CFVP): A new way to afford 7H-dibenzo[b,d]azepin-7-one
Abstract

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.

Graphical abstractCatalytic 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. While in the absence of the catalyst the thermal reaction afforded 7H-dibenzo[b,d]azepin-7-one (5) as the main product between 400 and 500 °C, in the cfvp different products were obtained between 350 and 450 °C depending on the type of catalysts.Figure optionsDownload full-size imageDownload high-quality image (67 K)Download as PowerPoint slide

Keywords
MCM-41; Flash vacuum pyrolysis; Azepinone; Mesoporous catalysts; Nitrogen extrusion
First Page Preview
Catalytic flash vacuum pyrolysis (CFVP): A new way to afford 7H-dibenzo[b,d]azepin-7-one
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 373, Issues 1–2, 31 January 2010, Pages 98–103
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis