4,5,6,7-Tetrahydrothieno[3,2-c]pyridin-2(3H)-one

China [CN]

I. Basic Information

Chinese Name: 4,5,6,7-Tetrahydrothieno[3,2-c]pyridin-2(3H)-one

English Name: 4,5,6,7-Tetrahydrothieno[3,2-c]pyridin-2(3H)-one

CAS Number: 17788-36-4 (reference value, may vary slightly between databases)

Molecular Formula: C₇H₉NOS

Molecular Weight: 155.22 (Calculated Formula: C: 54.165%, H: 84%, N: 9.02%, O: 10.30%, S: 20.68%)

II. Chemical Structure and Core Characteristics

Structural Analysis: The molecule is composed of a thiophene ring (a sulfur-containing five-membered heterocycle) fused with a tetrahydropyridine ring (a saturated six-membered nitrogen-containing heterocycle). It is a fused heterocyclic compound, with the 3,2 positions of the thiophene ring linked to the c position of the pyridine ring. Functional Groups: Keto (-CO-) at position 2, imino/methylene at positions 3 and 6 (due to the saturated ring, the nitrogen atom on the tetrahydropyridine ring forms a tertiary amine structure, forming a single bond with the adjacent carbon).

Structural Stability: The presence of the saturated ring (tetrahydropyridine ring) makes it more stable than aromatic fused rings. The conjugation between the keto group and the heterocyclic ring enhances the chemical stability of the molecule.