In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Bisbenzothieno[3,2-b:2′,3′-e]pyridines, published in 2004-09-30, which mentions a compound: 1001-26-9, Name is Ethyl 3-Ethoxy-2-Propenoate, Molecular C7H12O3, Name: Ethyl 3-Ethoxy-2-Propenoate.
Heating potassium 3-aminobenzo[b]thiophene-2-carboxylate with Et propiolate or Et 3-ethoxyacrylate in acetic acid yielded the Et 2-(6,12-Dihydro-bis[1]benzothieno[3,2-b:2′,3′-e]pyridin-6-yl)-acetate (I) as main product and 1,4-dihydro-[1]benzothieno[3,2-b]-4-pyridone as byproduct. The dihydropyridine (DHP) I was dehydrogenated with ammonium cerium nitrate (CAN) to give its pyridine derivative II. The half wave potential E1/2 = 1.64 V showed that I was much more stable against oxidizing agents than the reference compound nifedipine with E1/2 = 1.15 V. Alk. saponification of the acetic acid ester II did not yield the corresponding acetic acid, because decarboxylation took place to form the methylpyridine derivative
In some applications, this compound(1001-26-9)Name: Ethyl 3-Ethoxy-2-Propenoate is unique.If you want to know more details about this compound, you can contact with the author or consult more relevant literature.
Reference:
Bromide – Wikipedia,
bromide – Wiktionary