Diisopropylethylamine → 3-cyclopentyl-N-(5-isopropylisoxazol-4-yl)-2-[4-(methylsulfonyl)phenyl]propanamide

Participants

Reaction Steps

To a solution (15 ml) of 3-cyclopentyl-2-[4-(methylsulfonyl)phenyl]propanoic acid (2.00 g) in N,N-dimethylformamide were added N,N-diisopropylethylamine (3.49% mL), 1-[bis(dimethylamino)methylene]-1H-1,2,3-triazolo(4,5-b)pyridinium 3-oxide hexafluorophosphate (2.82 g) and 5-isopropylisoxazol-4-amine hydrochloride (1.15 g), and the mixture was stirred at room temperature for 48 hr. Water was added to the reaction mixture, and the mixture was extracted with ethyl acetate. The extract was washed successively with water and saturated brine, dried over anhydrous sodium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate:hexane=30:70-100:0, volume ratio) to give the title compound (2.50 g, 92%) as colorless amorphous crystals. MS: 405 (MH+).

Provenance & Evidence