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Photochemical cyclization of some aldehyde thiosemicarbazones
Author(s) -
Gruttadauria Michelangelo,
Buccheri Francesco,
Buscemi Silvestre,
Cusmano Giuseppe,
Noto Renato,
Werber Giuseppe
Publication year - 1992
Publication title -
journal of heterocyclic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.321
H-Index - 59
eISSN - 1943-5193
pISSN - 0022-152X
DOI - 10.1002/jhet.5570290142
Subject(s) - chemistry , aldehyde , methanol , ring (chemistry) , semicarbazone , medicinal chemistry , photochemistry , organic chemistry , catalysis
The photochemical behaviour of some substituted aldehyde thiosemicarbazones 1a‐k has been investigated in methanol at 254 nm. Thiosemicarbazones of glyoxil methyl ester 1a‐f cyclized to furnish the 3‐thioxo‐ 1,2,4‐triazin‐5‐one 2 ring system. The remaining thiosemicarbazones 1g‐j gave 1,2,4‐triazoline 4 derivatives.