Imidazolidine is a heterocyclic compound (CH2)2(NH)2CH2. The parental imidazolidines are less studied, but related compounds substituted on one or both nitrogen centers are more common. Generally, they are colorless, polar, basic compounds. Imidazolidines are examples of cyclic 5-membered general amines. Imidazolidine derivatives are key components in the development of bioactive compounds for the treatment of various diseases, especially Chagas disease. In fact, other studies have shown that imidazoline-2,4-diones have a wide range of pharmacological activities, including anticonvulsant, antiarrhythmic, and antiparasitic.
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Tetrahydrothiophene is a sulfur-containing saturated heterocyclic compound obtained by catalytic hydrogenation of thiophene. After thiophene is reduced to tetrahydrothiophene, it no longer has a conjugated system and aromaticity. Therefore, tetrahydrothiophene shows the properties of general thioethers. Easily oxidized to sulfoxides and sulfones. Tetrahydrothiophene can be used as a raw material for the production of pharmaceuticals, pesticides and photochemicals.
When the ends of the chains are joined together into a ring, cyclic compounds result; such substances often are referred to as carbocyclic or alicyclic compounds. Substitution of one or more of the ring carbon atoms in the molecules of a carbocyclic compound with a heteroatom gives a heterocyclic compound.