Synthesis of 4-tert-butylperoxy-4-methylpentan-2-one and 3-tert-butylperoxy-3-methylbutanoic acid
摘要:
Alkylation of tert-butyl hydroperoxide with 1,3-diols gave the corresponding hydroxy-containing ditertiary peroxides which were oxidized with pyridinium chlorochromate to carbonyl-containing peroxides. 3-tert-Butylperoxy-3-methylbutanal was oxidized with oxygen at room temperature to obtain 3-tert-butylperoxy-3-methylbutanoic acid.
Compounds by addition of hydroperoxides to .alpha.-.beta.-unsaturated
申请人:Pennwalt Corporation
公开号:US04257985A1
公开(公告)日:1981-03-24
Compounds containing at least one keto group and at least one peroxy group, each peroxy oxygen being joined to a tertiary carbon atom. Examples: 2-Methyl-2-(t-butylperoxy)-4-pentanone. 2,6-Dimethyl-2,6-bis(t-butylperoxy)-4-heptanone. 3,5,5-Trimethyl-3-(t-butylperoxy)cyclohexanone. The compounds are prepared by the strong acid catalyzed addition of a tertiary hydroperoxide to an .alpha.,.beta.-unsaturated ketone. Illustration: Mesityl oxide and pinanyl hydroperoxide, in slight excess, were reacted at 0.degree. C. in the presence of 77% sulfuric acid; the reaction mix was stirred for 16 hours at 25.degree. C. Product 2-methyl-2-pinanylperoxy-4-pentanone was recovered.
Compounds by addition of hydroperoxides to .alpha., .beta.-unsaturated
申请人:Pennwalt Corporation
公开号:US04289914A1
公开(公告)日:1981-09-15
Compounds containing at least one keto group and at least one peroxy group, each peroxy oxygen being joined to a tertiary carbon atom. Examples: 2-Methyl-2-(t-butylperoxy)-4-pentanone. 2,6-Dimethyl-2,6-bis(t-butylperoxy)-4-heptanone. 3,5,5-Trimethyl-3-(t-butylperoxy)cyclohexanone. The compounds are prepared by the strong acid catalyzed addition of a tertiary hydroperoxide to an .alpha.,.beta.-unsaturated ketone. Illustration: Mesityl oxide and pinanyl hydroperoxide, in slight excess, were reacted at 0.degree. C. in the presence of 77% sulfuric acid; the reaction mix was stirred for 16 hours at 25.degree. C. Product 2-methyl-2-pinanyl-peroxy-4-pentanone was recovered.
Blends of epihalohydrin polymers and lower polyolefins containing an acid acceptor, an unsaturated polyfunctional acrylate or methacrylate, and a coagent that is cured with an organic peroxide provide low viscosity, improved hardness, easy processing, and improved physical properties on curing.