205121-87-5Relevant academic research and scientific papers
A New Preparation of Substituted 4H-1-Benzothiopyran-4-ones from C(α),N-Benzoylhydrazones or C(α),N-Carboalkoxyhydrazones and Methyl Thiosalicylate
French, Kristen L.,Angel, April J.,Williams, Angela R.,Hurst, Douglas R.,Beam, Charles F.
, p. 45 - 48 (1998)
C(α),N-Benzoylhydrazones or C(α),N-carboalkoxyhydrazones were dilithiated with excess lithium diisopropylamide, and the dianion-type intermediates were condensed with lithiated methyl thiosalicylate, followed by cyclization/hydrolysis to substituted 4H-1-benzothiopyran-4-ones (thioflavones/thiochromones).
