Water → HCID 59314405, compound

Participants

Reaction Steps

The mixture of 1,3-dimethyl-5-[(5,6,7,8-tetrahydro-naphthalene-1-carbonyl)-amino]-5,6-dihydro-4H-cyclopenta[c]thiophene-5-carboxylic acid ethyl ester (74) (942 mg, 2.37 mmol) and KOH (3 g, 23 mmol) is dissolved in EtOH (20 mL) and water (1 mL) under a water bath. The water bath is removed when KOH is completely dissolved and the resulting reaction solution is stirred at RT for 8 h. After concentration in vacuo, the residue is dissolved in water (20 mL) and acidified with conc. HCl until no more precipitate formed. The precipitate is filtered to give a pure product (75) as a pale brown solid (832 mg, 95%).

Provenance & Evidence