Acetic Acid → 2-Propenoic acid, 3-phenyl-

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Reaction Steps

A mixture of 77.4 g of 1,1,1,3-tetrachloro-3-phenylpropane, 7.7 g of 98% acetic acid and 1.8 g of 98% sulphuric acid is stirred and refluxed at 130° to 138° C. while a mixture of 15.5 g of water, 4 ml of acetic acid and 0.5 ml of sulphuric acid is gradually added over the period of 2.5 h, after which time the hydrogen chloride evolution ceases. The work-up of the reaction mixture as described in Example 1 gives 33.6 g of cinnamic acid in 75.6% total yield (melting point 132° to 133° C., min. 99% purity).

Provenance & Evidence