Triethylamine → (2R)-N-{(2R)-2-[6-(2,5-dimethyl-1H-pyrrol-1-yl)-3-pyridinyl]-2-hydroxyethyl]-6-iodo-3,4-dihydro-2H-chromene-2-carboxamide

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Reaction Steps

A reaction mixture containing (2R)-6-iodo-3,4-dihydro-2H-chromene-2-carboxylic acid (Example 7, 5.39 mmol, 1.0 eq.), (1R)-2-amino-1-[6-(2,5-dimethyl-1H-pyrrol-1-yl)-3-pyridinyl]ethanol dihydrochloride (U.S. Pat. No. 6,051,586) (6.47 mmol, 1.2 eq.), 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDCl, 10.8 mmol, 2.0 eq.), 1-hydroxybenzotriazole hydrate (HOBT, 10.8 mmol, 2.0 eq.), and triethylamine (16.2 mmol, 3.0 eq.) in CH2Cl2 (30 mL) was stirred at room temperature for 18 hours. Water was added to the reaction mixture and the resulting two-phase mixture was extracted with CH2Cl2. The combined organic extracts were washed with water and brine, dried over anhydrous sodium sulfate, concentrated and purified by medium pressure column chromatography (Biotage 40S normal phase silica gel column, CH2Cl2:MeOH=100:4). The product was obtained as a pale yellow foam in 56% yield. MH+=518.2, RT=3.74 min.

Provenance & Evidence