Diisopropylethylamine → HCID 178454316, compound

Participants

Reaction Steps

Trans-5-(2-aminoxyethoxy)-3-[4-(2-oxopyrrolidin-1-yl)cyclohexylcarbonylamino]-N-(5-chloropyridin-2-yl)benzofuran-2-carboxamide dihydrochloride (90 mg) obtained in Example 183 is dissolved in N,N-dimethyl formamide (3 ml), and thereto are added N,N-diisopropylethylamine (38 μl) and N,N′-bis(t-butoxycarbonyl)-1H-pyrazole-1-carboxamidine (57 mg), and the mixture is stirred at room temperature for one day. The reaction solution is concentrated under reduced pressure, and the residue is poured into water, and extracted with chloroform. The organic layer is dried over sodium sulfate, and the solvent is evaporated under reduced pressure. The resulting residue is purified by NH-silica gel column chromatography (eluent: n-hexane/ethyl acetate=1/1, then ethyl acetate) to give trans-5-{2-[N,N′-bis(t-butoxycarbonyl)-guanidinoxy]ethoxy}-3-[4-(2-oxopyrrolidin-1-yl)cyclohexylcarbonylamino]-N-(5-chloropyridin-2-yl)benzofuran-2-carboxamide (82 mg).

Provenance & Evidence