Truxillic acid



Truxillic acids are any of several crystalline stereoisomeric cyclic dicarboxylic acids (C6H5)2C4H4(COOH)2 that yield cinnamic acid on distillation. The two trans alkenes react head-to-tail, and the isolated isomers are called truxillic acids. This products are made by a photochemical cycloaddition: