REACTIONS OF HYDRAZONOYL HALIDES 39¹: SYNTHESIS OF SOME NEW TRIAZOLES AND 2,3-DIHYDRO-1,3,4-THIADIAZOLES

Abstract

C-acyl-N-phenyllhydrazonoyl halides 1a–ghave been caused to react with 3-(aminomethylthiomethyl)-2H-chromen-2-one in the presence of triethylamine to give triazoles. Also, C-acyl-N-pyrazolylhydrazonoyl chlorides 13a, breact with alkyl carbodithioates (14or 15) a–mafforded 2,3-dihydro-1,3,4-thiadiazoles in good yields. Structures of the new compounds were elucidated on the basis of elemental analyses, spectral data, and alternative methods of synthesis whenever possible.

Keywords:

• 1,2,4-triazoles
• 1,3-dipolar cycloaddition
• 1,3,4-thiadiazoles
• 2H-chromen-2-one
• carbodithioates
• hydrazonoyl halides
• thiocarbamates