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Trends in Heterocyclic Chemistry   Volumes    Volume 8 
Abstract
Chemoselective heterocyclization of pharmacological activities of new heterocycles- a review: synthesis of new phospha heterobicyclic systems containing 1,2,4- triazine moiety
Part IX: straightforward synthesis of new fluorine bearing 5-phospha -1,2,4 -triazin / 1,2,4- triazepine -3 thiones

R. M. Abdel-Rahman
Pages: 187 - 195
Number of pages: 9
Trends in Heterocyclic Chemistry
Volume 8 

Copyright © 2002 Research Trends. All rights reserved

ABSTRACT

Novel synthesis of fluorine bearing 5-phospha - l,2,4-triazin-3-thiones and 5 -phospha-1,2,4-triazepin - 3 - thiones was developed by use of the N4 - substituted thiosemicarbazides with diethylbenzoyl phosphonate , diphenyl ( 2,4,6-trimethylbenzoyl) phosphine oxide and/or acetonyl triphenylphosphonium chloride in the presence of THF - DMF followed by fluorinated under refluxing with trifluoroacetic anhydride.

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