Heteropolycyclic molecules. Part IX. Synthesis of some new benzo[b]thiophene,oxofluoreno[4,3-b]thiophene,cyclic hydrazides and acridine compounds

p-Tolyl 2-thienyl ketone (I) condensed with dimethyl succinate in the presence of potassium t-butoxide to give the trans (SC₄H₃/CO₂Me) half-ester (IIIa) whose configuration was deduced by cyclization to the corresponding benzob]thiophene derivatives. Carbamates, esters, cyclic hydrazides and substituted phenolic and acetic acids useful as antibacterial and antiinflamatory agents were obtained. The reaction of ketone I with malononitrile to give ylidenemalononitrile II was also considered.