Acetoxyacetyl chloride → 2-{[6-(2-Chlorophenyl)-5-(4-chlorophenyl)-2-(2-hydroxy-2-methylpropanoyl)furo[2,3-b]pyridin-3yl]amino}-2-oxoethyl acetate

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Reaction Steps

To a solution of 4.0 g of the product of Example 100 in 25 mL of acetonitrile was added 7.5 mL acetoxy acetylchloride and the reaction mixture was stirred at room temperature. After 50 min the reaction mixture was diluted with CH2Cl2 and washed two times with aqueous sodium bicarbonate. The organic layer was dried over sodium sulfate then concentrated. The residue was suspended in 150 mL of methanol at 60–65° C. After cooling to room temperature the methanol was decanted away and the solid rinsed three times with fresh methanol. The solids were then dried in vacuo to afford the title compound. HPLC/MS: 540.9 (M+1), 542.8 (M+3); Rt=4.07 min.

Provenance & Evidence