abstract |
(57) Summary: The present invention produces tetrahydro-4H-pyran-4-one from 1,5-dihalopentan-3-one in the presence of a phosphate salt, a carboxylic acid or a salt thereof, and water. Tetrahydro-4H-pyran-4 characterized in that -Regarding the manufacturing method of ON. EFFECTS OF THE INVENTION According to the present invention, the formation of insoluble matter, which complicates post-treatment after reaction, is reduced, and 1,5-dihalopentane- Tetrahydro-4H-pyran-4-one can be prepared from 3-one. |