Diisopropylethylamine → HCID 178520753, compound

Participants

Reaction Steps

A DMF (4 mL) solution of trans-6-[3-(2-fluoro-phenyl)-ureido]-3,4-dihydro-1H-isoquinoline-2-carboxylic acid 4-carboxymethyl-cyclohexyl ester (188 mg) obtained in Example 2, 1H-tetrazol-5-ylamine (54 mg), BOP reagent (212 mg), and diisopropylethylamine (0.10 mL) was stirred overnight at room temperature. The reaction mixture was diluted with 1 N hydrochloric acid, followed by extraction with ethyl acetate. The organic layer was concentrated and vigorously stirred in water/isopropyl ether. The obtained solid was heated to reflux in methanol and collected by filtration. The title compound (99 mg, 46%) was obtained as a pale yellow solid.

Provenance & Evidence