Ao. Abdelhamid et al., Reactions with hydrazonoyl halides XXX: Synthesis of some 2,3-dihydro-1,3,4-thiadiazoles and unsymmetrical azines containing benzothiazole moiety, PHOSPHOR SU, 167, 2000, pp. 251-258
Citations number
20
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
PHOSPHORUS SULFUR AND SILICON AND THE RELATED ELEMENTS
C-Benzothiazoloyl-N-arylhydrazonoyl bromides 1a,b have been caused to react
with each of methyl 2-thiazolylcyanomethinecarbodithioate (2), alkyl carbo
dithioates 8-10. and methyl thiocarbamates 14a-c in the presence of triethy
lamine to give 2,3-dihydro-1,3,3-thiadiazoles in good yields. In contrast,
hydrazonoyl bromides react with each of phenylthiourea (19a). phenylthiosem
icarbazide (19b) and benzoylthiosemicarbazide (19c) afforded 5-arylazothiaz
ole zole 22-24a derivatives, respectively. Structures of the new compounds
were elucidated on the basis of elemental analyses, spectral data, and alte
rnative methods of synthesis whenever possible.