Synthesis of Selenosemicarbazides and 1,2,4-Triazoles
摘要:
Acyl isoselenocyanates (1) were prepared from KSeCN and acyl chlorides in situ. Reactions of the acyl isoselenocyanates (1) with phenylhydrazine gave 2-phenyl-1,2-dihydro-3H-1,2,4-triazole-3-selones (2) and selenosemicarbazides (3). The obtained selenosemicarbazides (3) were refluxed in the presence of triethylamine in THF and trapped with alkyl halides to obtain the corresponding 3-alkylseleno-1-phenyl-1H-1,2,4-triazoles (5) in moderate yields.
Synthesis of Selenosemicarbazides and 1,2,4-Triazoles
摘要:
Acyl isoselenocyanates (1) were prepared from KSeCN and acyl chlorides in situ. Reactions of the acyl isoselenocyanates (1) with phenylhydrazine gave 2-phenyl-1,2-dihydro-3H-1,2,4-triazole-3-selones (2) and selenosemicarbazides (3). The obtained selenosemicarbazides (3) were refluxed in the presence of triethylamine in THF and trapped with alkyl halides to obtain the corresponding 3-alkylseleno-1-phenyl-1H-1,2,4-triazoles (5) in moderate yields.