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SYNTHESIS OF 1H-BENZOTHIOPYRANOIMIDAZOL-4-ONES
Savel'ev, V.L.,Afanas'eva, T.G.,Klyuev, S.M.,Zagorevskii, V.A.
, p. 363 - 367 (1980)
By the condensation of 3,4-diaminothiocoumarins containing primary or secondary amino groups in position 4, with formic and acetic acids (or acetic anhydrides), a number of 1H-benzothiopyranoimidazol-4-ones and their 2-methyl derivatives have be
