Ammonia → 4-(6-Fluoro-3,4-dimethoxyphenyl)-4,5,6,7-tetrahydrothieno[2,3-c]pyridine

Participants

Reaction Conditions

Reaction Steps

A mixture of 0.66 g of α-[[(2-thenyl)amino]methyl]-6-fluoro-3,4-dimethoxybenzyl alcohol and 10 ml of polyphosphoric acid was stirred for 3.5 hours at 60° C. The reaction solution was poured into ice water, and the mixture was basified by addition of 25 ml of conc. aqueous ammonia. The mixture was extracted with chloroform, and the chloroform layer was washed with water, and dried over anhydrous magnesium sulfate. The solvent was distilled off, and 0.66 g of 4-(6-fluoro-3,4-dimethoxyphenyl)-4,5,6,7-tetrahydrothieno[2,3-c]pyridine was obtained as a syrupy matter.

Provenance & Evidence