Diisopropylethylamine → HCID 22890448, compound

Participants

Reaction Conditions

Reaction Steps

The N-{(4-cyanophenylamino)-[4,5-diethoxy-2-(methanesulfonyl-methyl-amino)-phenyl]-acetyl}benzenesulfonamide obtained above (126 mg, 0.21 mmole) was dissolved in ethanol (1.8 ml) and heated to 60° C. Diisopropylethylamine (DIPEA—260 ul, 1.5 mmole) was added followed by hydroxylamine-hydrochloride (74 mg, 1.04 mmole). The reaction was stirred at 60° C. under a nitrogen atmosphere for 6 hours. The reaction was then allowed to cool to room temperature. The solution was diluted with methanol (5 ml) and acetic acid (2 ml) and Raney Nickel 2800 (ca. 50 mg) added as a suspension. The reaction was then stirred vigorously under a hydrogen atmosphere for 1 hour. The catalyst was filtered off and the solvent removed. The crude product was purified by preparative reverse-phase HPLC using a water-acetonitrile (0.1% TFA) gradient to yield 40 mg of desired 4-{2-benzenesulfonylamino-1-[4,5-diethoxy-2-(methanesulfonyl-methyl-amino)phenyl]-2-oxo-ethylamino}benzamidine as its trifluoroacetic acid salt. MS: (M+H)=604.

Provenance & Evidence