| 摘要 |
PURPOSE: To obtain the subject compound useful as a comonomer component of a copolymer for fiber, a solvent, etc., in high yield at a low cost by reacting methyl methacrylate with a formic acid ester, forming a methylsuccinic acid diester, hydrogenating and cyclodehydrating the resultant diester. CONSTITUTION: Methyl methacrylate and a formic acid ester (e.g. methyl formate) are added to an autoclave, made of stainless steel and equipped with a thermometer and a pressure indicator. An element belonging to group VIII of the periodic table (e.g. ruthenium) is used as a catalyst and benzene. etc., are used as a solvent. Carbon monoxide gas is filled therein and the reaction is carried out at 200 deg.C for 24hr to form a methylsuccinic acid diester of formula I (R is an alkyl), which is then hydrogenated and cyclodehydrated using a copper-chromite catalyst at 150-200 deg.C to industrially and advantageously afford the objective 3-methyltetrahydrofuran of formula II usable as a comonomer component of a copolymer which is a raw material for fibers rich in elasticity, a solvent, etc. |
