METHYL A-HEXAHYDRO-1H-THIENO[3,4-B]PYRROLE-6A-CARBOXYLATE

The title compound, C15H19NO3S, has cis stereochemistry at the ring ju nction, resulting from an exo intramolecular 1,3-dipolar cycloaddition . It crystallizes as a racemate. The tetrahydrothieno ring has an S-en velope form and the pyrrole ring adopts a half-chair conformation. The amino H atom is shared in a bifurcated intramolecular hydrogen bond b etween the bare O atoms of the carboxylate and methoxy groups. Cohesio n of the structure is achieved through weak intermolecular interaction s only.