A NEW PREPARATION OF SUBSTITUTED 4H-1-BENZOTHIOPYRAN-4-ONES FROM C(ALPHA),N-BENZOYLHYDRAZONES OR C(ALPHA),N-CARBOALKOXYHYDRAZONES AND METHYL THIOSALICYLATE

Authors
FRENCH KL ANGEL AJ WILLIAMS AR HURST DR BEAM CF
Citation
Kl. French et al., A NEW PREPARATION OF SUBSTITUTED 4H-1-BENZOTHIOPYRAN-4-ONES FROM C(ALPHA),N-BENZOYLHYDRAZONES OR C(ALPHA),N-CARBOALKOXYHYDRAZONES AND METHYL THIOSALICYLATE, Journal of heterocyclic chemistry, 35(1), 1998, pp. 45-48
Citations number
38
Categorie Soggetti
Chemistry Inorganic & Nuclear
Journal title
Journal of heterocyclic chemistry → ACNP
ISSN journal
0022152X
Volume
35
Issue
1
Year of publication
1998
Pages
45 - 48
Database
ISI
SICI code
0022-152X(1998)35:1<45:ANPOS4>2.0.ZU;2-7
Abstract
C(alpha),N-Benzoylhydrazones or C(alpha),N-carboalkoxyhydrazones were dilithiated with excess lithium diisopropylamide, and the dianion-type intermediates were condensed with lithiated methyl thiosalicylate, fo llowed by cyclization/hydrolysis to substituted 4H-1-benzothiopyran-4- ones (thioflavones/thiochromones).