Process for producing 2-hydroxy-4-methyltetrahydropyran

Details Process for producing 2-hydroxy-4-methyltetrahydropyran Process for producing 2-hydroxy-4-methyltetrahydropyran

C - Chemistry, Metallurgy

07

D

260/360.4

C07D 309/12 (2006.01) C07D 309/10 (2006.01)

Patent

CA 1279326

Abstract: The invention relates to the hydroformylation of 3-methyl-3-buten-1-ol with hydrogen and carbon monoxide which, when carried out under relatively mild conditions, gives 2-hydroxy-4-methyltetrahydropyran (MHP) at a high rate of reaction and with high selectivity even at a very low rhodium catalyst concentration. The reaction is carried out in the presence of a rhodium compound as a catalyst and a tris (substituted aryl) phosphite of defined electronic and stearic parameters. MHP is useful as a starting material for the production of 3-methyl-1,5-pentanediol and .beta.-methyl-.delta.-valerolactone which are in turn usable as raw materials for producing polyesters and polyurethanes. The process according to the invention can produce MHP in a manner which is advan- tageous from the industrial viewpoint and has very great industrial utility.

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