Abstract
The free radical induced addition of acetic acid and its derivatives to olefins has been reported recently. As an extension of this reaction, the addition of acetic acid to acetylenic compounds was investigated.Adipic acid was found to be the major product of the reaction of excess acetic acid and acetylene at 110–120 °C under pressure in the presence of organic peroxides. A second oily acidic product with a molecular weight of about 300, not yet identified, was found to the extent of about 2 parts by weight to every 3 parts of adipic acid.Octen-3-oic acid and its anhydride were synthesized from hexyne-1 and excess acetic acid in the presence of organic peroxides. Acetic anhydride was substituted for acetic acid, with the net advantage that acetylene was more soluble in the solvent. The general scope of the reaction was expanded to include other transfer agents, such as acetone, formic acid, and propionic acid.
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