| 摘要 |
<p>PURPOSE: To efficiently obtain a high-purityγ-alkyl-γ-lactone which is useful as a starting substance for perfumes, medicines, agrochemicals, etc., in high yield by reaction of acrylic acid with a specific alcohol in the presence of a di-tert.-butyl peroxide under specific conditions. CONSTITUTION: Thisγ-alkyl-γ-lactone is obtained by allowing acrylic acid to react with a primary alcohol of 5-10 carbon atoms such as 1-pentanol or a secondary alcohol such as 2-pentanol or their mixture in the presence of a di-tert.-butyl peroxide at 160-190 deg.C under an absolute pressure of 10kg/cm<2> , as low-boiling components are distilled off. The amount of the alcohol in the reaction is preferably 4-7 moles per mole of acrylic acid and the di-tert.-butyl peroxide is 0.04-0.2 mole per mole of acrylic acid.</p> |
