Background: Xanthenes and benzoxanthenesare are highly valuable compounds in organic chemistry and medicinal chemistry. Xanthene derivatives were found to have many applications in medicinal chemistry.
Objective: This work aims to explore the synthesis of xanthene derivatives with various substituents and find the possibility of their uses as anticancer agents.
Background: 2-Amino thiophene derivatives are important compounds not only for their uses in many heterocyclic reactions but also due to their wide range of pharmaceutical and biological activities.
Objective: The aim of this work was to explore a number of new heterocyclic derivatives, studying their inhibitions toward cancer cell lines and studying their structure activity relation ship.
Methods: Alkylation of 2-amino-4,5,6,7-tetrahydrobenzo[b]thiophene-3-carbonitrile was achieved through its reaction with chloroacetone and 2-bromo-1-(4-aryl)ethanone derivatives to give compounds 3 and 11a-c.
Novel tetrahydrobenzo[b]thienopyrole derivatives are synthesized from 2-amino-3-cyano-4,5,6,7-tetrahydrobenzo[b]thiophene (1) through its reaction with α-chloroacetone to give the corresponding N-alkyl derivative 3. Compound 3 undergoes ready cyclization in sodium ethoxide solution to give the tetrahydrobenzo[b]thienopyrrole 4. The latter compound 4 is used as the key starting material for the synthesis of thiophene, thieno[2,3-b]pyridine and pyran derivatives.
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