Diisopropylethylamine → (R)-tert-Butyl 6-(methyl(1-(pyridin-4-yl)piperidin-4-yl)carbamoyl)-2,3-dihydro-1H-inden-1-ylcarbamate

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Reaction Steps

HATU (0.795 g, 2.09 mmol, 1 eq) and DIPEA (350 μA 2.04 mmol, 2.5 eq) were added to an ice-cooled solution of (R)-3-(tert-butoxycarbonylamino)-2,3-dihydro-1H-indene-5-carboxylic acid (368 mg, 2.09 mmol, 1 eq) in THF (5 ml), and stirring was carried out for 30 min. N-Methyl-1-(pyridin-4-yl)piperidin-4-amine (AMN-06) (400 mg, 2.09 mmol, 1 eq) was dissolved in THF (5 ml) and added dropwise to the reaction solution, and stirring was carried out for 16 h at RT. The reaction solution was diluted with dichloromethane (100 ml), washed with sat. sodium hydrogen carbonate solution (50 ml), sat. ammonium chloride solution (50 ml), water (50 ml) and sat. NaCl solution (50 ml), dried over sodium sulfate and concentrated under reduced pressure. After purification by column chromatography (silica gel, 0.5% MeOH in dichloromethane), the desired product was obtained in the form of a yellowish solid. Yield: 64% (600 mg, 1.33 mmol).

Provenance & Evidence