Sodium hydride → 2-Cyano-2-(2-nitro-5-phenoxy-benzyl)-hex-5-enoic acid ethyl ester

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Reaction Conditions

Reaction Steps

To a round bottom flask equipped with a nitrogen inlet 2-cyano-hex-5-enoic acid ethyl ester (2.0 g, 11.96 mmol) and DMF (40 mL) were added. The reaction mixture was cooled to 0° C. followed by addition of NaH (0.48 g, 12.0 mmol, 60% dispersion in mineral oil). The reaction mixture was allowed to stir at 0° C. for another 5 min, followed by addition of 2-chloromethyl-1-nitro-4-phenoxy-benzene (2.6 g, 9.86 mmol). The reaction turned a dark purple color. After 3 h the reaction was quenched with 1N HCl, and the solvent was evaporated to yield a crude mixture. The crude mixture was dissolved in ethyl acetate and washed 3 times with 1N HCl followed by a wash with saturated brine solution. The phases were separated, and the organic phase was dried with sodium sulfate and filtered, and the solvent was removed under reduced pressure to yield a residue. The residue was purified by flash chromatography using heptanes/ethyl acetate as the mobile phase 9:1 to yield a residue.

Provenance & Evidence