Browsing by Author "Areda, Alemayehu"

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    Synthesis of Hetecrocyclic Compounds Starting from 3-Amino and 3-Hydroxythioacrylamides
    (Addis Ababa Universty, 1982-06) Areda, Alemayehu; Liebscher, J. (PhD)
    The 3-amino- and 3-hydroxythioacrylamides were obtained by deprotonation and hydrolysis of l-mercaptotrimethinium perchlorates respectively. In this researeh, both the thioacrylamides and the mercapto salts were used +; as starting materials to implement the synthesis of 2-amino~5-nitrothiophenes, 5-aminopysazoles, aminothiopyrylium salts and 5-aminoiso::.:azoles • For the amino. itrothiophenes and aminopyrazoles attempts made to solate reaction intermediates were successful and acceptable mechanisms have been suggested. In almost all cases reactions were rapid and yields were high.