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Gas‐phase pyrolysis in heterocyclic synthesis. Gas‐phase elimination reactions of some substituted aminoazoles

Gas‐phase pyrolysis in heterocyclic synthesis. Gas‐phase elimination reactions of some... Gas‐phase pyrolyses of ethyl N‐(5‐cyanomethyl‐1,3,4‐thiadiazol‐3‐yl)carbamate (1), 1‐benzoyl‐3‐(3‐methylpyrazol‐5‐yl)thiourea (2), 1‐benzoyl‐3‐(5‐methylisoxazol‐3‐yl)thiourea (3), and 1‐acetyl‐3‐(3‐phenyl‐pyrazol‐5‐yl)thiourea (4) have been studied. These reactions were homogeneous and unimolecular. The kinetics obeyed the first‐order rate equation. Utilization of this pyrolytic reaction in heterocyclic synthesis is considered, and mechanistic information has been obtained from kinetic data and product analysis using an on‐line pyrolysis GC‐MS technique. The physical constants of four new substituted aminoazoles are also described. © 1997 John Wiley & Sons, Inc. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Heteroatom Chemistry Wiley

Gas‐phase pyrolysis in heterocyclic synthesis. Gas‐phase elimination reactions of some substituted aminoazoles

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References (4)

Publisher
Wiley
Copyright
Copyright © 1997 Wiley Subscription Services
ISSN
1042-7163
eISSN
1098-1071
DOI
10.1002/(SICI)1098-1071(1997)8:4<293::AID-HC2>3.0.CO;2-C
Publisher site
See Article on Publisher Site

Abstract

Gas‐phase pyrolyses of ethyl N‐(5‐cyanomethyl‐1,3,4‐thiadiazol‐3‐yl)carbamate (1), 1‐benzoyl‐3‐(3‐methylpyrazol‐5‐yl)thiourea (2), 1‐benzoyl‐3‐(5‐methylisoxazol‐3‐yl)thiourea (3), and 1‐acetyl‐3‐(3‐phenyl‐pyrazol‐5‐yl)thiourea (4) have been studied. These reactions were homogeneous and unimolecular. The kinetics obeyed the first‐order rate equation. Utilization of this pyrolytic reaction in heterocyclic synthesis is considered, and mechanistic information has been obtained from kinetic data and product analysis using an on‐line pyrolysis GC‐MS technique. The physical constants of four new substituted aminoazoles are also described. © 1997 John Wiley & Sons, Inc.

Journal

Heteroatom ChemistryWiley

Published: Jan 1, 1997

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