Diisopropylethylamine → (R)-Methyl 3-(2-chloro-3-fluorobenzamido)-2,3-dihydro-1H-indene-5-carboxylate

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Reaction Steps

(3R)-3-Amino-2,3-dihydro-1H-indene-5-carboxylic acid methyl ester hydrochloride (A-01) (0.2 mmol, 1 eq) was dissolved in dichloromethane, and DIPEA (2.5 eq) and 2-chloro-3-fluorobenzoic acid chloride (1.2 eq) were added under a protecting gas atmosphere at 0° C. The reaction mixture was stirred for 2 h at RT. Then the reaction mixture was diluted with ethyl acetate, washed 1× with sat. NaHCO3 solution, 1× with 10% ammonium chloride solution and 1× with sat. NaCl solution, dried over magnesium sulfate and purified by column chromatography (silica gel, cyclohexane:ethyl acetate 4:1). Yield: 92%

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