Chemistry of seven-membered heterocycles. II. Synthesis and reactions of 6,7-dihydro-8-aryl-8H-[1]benzothiepino[5,4-d]thiazolo[3,2-a]pyrimidino-10(11H)-one 5,5-dioxides

Reactions with (arylmethylene)cycloalkanones. 1. 2,6-Bis(arylmethylene)cyclohexanones

“…In previous papers (1)(2)(3), ,ß-unsaturated ketones were transformed into thiopyrimidine derivatives and in turn into compounds containing the thiazolopyrimido moiety. The work in the present series deals with the application of the above sequence of reactions to a,a'-bis(arylmethylene)cycloalkanones.…”

Hydrazonoyl Halides as Precursors for New Fused Heterocycles of 5α‐Reductase Inhibitors

“…The carbon atom near N‐pyrrole type is electron rich carbon and so H‐4 is expected to be more shielded than the carbon atom near N‐pyridine type. Typically the signal of H‐4 in similar compounds to 8 usually appears at δ 5.6–6.3 6, 12–14 whereas that similar to compound 9 appears at δ 3.95–4.15 15.…”