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Synthesis 1990; 1990(6): 491-492
DOI: 10.1055/s-1990-26915
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A Convenient Synthesis of 3-Alkyl-6-trifluoromethyl-3,6-dihydro-2H-1,3,4-thiadiazines

Yasuhiro Kamitori* , Masaru Hojo, Ryōichi Masuda, Yoshihiko Kawamura, Tōru Numai
  • *Department of Industrial Chemistry, Faculty of Engineering, Kobe University, Kobe 657, Japan
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Publication Date:
17 September 2002 (online)

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3-Dialkylhydrazono-1,1,1-trifluoro-2-alkanones 2, readily obtainable from the reaction of substituted benzaldehyde, propanal and formaldehyde dialkylhydrazones with trifluoroacetic anhydride, afford title compounds 5 in satisfactory yields on treatment with Lawesson reagent in refluxing benzene.