Tautomerism, regioisomerism, and cyclization reactions of acridinyl thiosemicarbazides
作者:Karel D. Klika、Eva Balentová、Kalevi Pihlaja、Juraj Bernát、Ján Imrich、Martina Vavrušová、Erich Kleinpeter、Andreas Koch
DOI:10.1002/jhet.5570430317
日期:2006.5
The regioselectivities of methyl- and phenylhydrazine with acridin-9-yl isothiocyanate (thus yielding thiosemicarbazides with acridine substituted on the urea-type side) were examined. Methylhydrazine regioselectivity was high with the α-nitrogen atom overwhelmingly more nucleophilic than the β-nitrogen atom; phenylhydrazine regioselectivity was poor but varied with the solvent and only in the case