Homophthalic anhydride → 2-carboxy-phenylacetic acid N-butyl-N-(2'-cyanobiphenyl-4-ylmethyl)-amide

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Reaction Steps

The starting material can be prepared, for example, as follows: A solution of 2.64 g of N-butyl-N-(2'-cyanobiphenyl-4-ylmethyl)-amine and 2.43 g of homophthalic acid anhydride in 50 ml of dioxane is heated under reflux for hour. After removal of the solvent, the residue is taken up in 100 ml of ethyl acetate and washed twice with 50 ml of water each time. After customary treatment, the organic phase yields a crude product that yields, from CH2Cl2 /ether/hexane, 2-carboxy-phenylacetic acid N-butyl-N-(2'-cyanobiphenyl-4-ylmethyl)-amide, m.p. 137°-139°.

Provenance & Evidence