Sodium Cyanide → 6-(4-Chloro-3-methoxy-phenyl)-2,2-dimethyl-3,6-dioxo-5-pyridin-4-yl-hexanenitrile

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Reaction Steps

A solution of the product of Example 1 Step 1 (4.0 g, 20.0 mmol) in DMF (7 ml) was added to a solution of sodium cyanide (300 mg, 6.12 mmol) in DMF (7 ml) over 15 minutes at room temperature. After stirring for a further 15 minutes, a solution of 4-chloro-3-methoxy-benzaldehyde (F. Claudi et al., J. Med. Chem., 1992, 35, 4408) (640 mg, 3.75 mmol) in DMF (6 ml) was added dropwise. The mixture was stirred at room temperature for 18 hours and then diluted with water and the pH of the solution adjusted to 9 with aqueous sodium hydrogen carbonate solution. The mixture was extracted with chloroform and the organic phase washed with water and brine, dried and concentrated in vacuo. The residue was chromatographed on silica gel eluting with chloroform/ethanol/0.880 ammonia solution (90:9:1) to give the title compound (3.1 g, 42%); MS (ES+) m/e 371, 373 [M+H]+.

Provenance & Evidence