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ChemicalBook CAS DataBase List Metaxalone
1665-48-1

Metaxalone synthesis

6synthesis methods
-

Yield:1665-48-1 97%

Reaction Conditions:

with potassium hydroxide;4-methyl-2-pentanone at 0 - 120; for 3 - 4 h;

Steps:

1 Preparation of Metaxalone

3,5 dimethyl phenol or m-Xylenol (190 kg), Triglycidyl isocyanurate (150 kg), MIBK (500.0 Lt) and Potassium Hydroxide (7.5 kg) were charged to a reactor at room temperature. The temperature of the mixture was raised to 115-120° C. and thereafter the reaction mixture was agitated at this temperature for 3-4 hrs till the completion of the reaction. The reaction mixture was cooled to 0-5° C. and the precipitated solid was centrifuged and dried to give 270 kg (of Metaxalone) having purity of between 95-96%, as an off-white solid. 150 kg of Metaxalone, thus obtained was dissolved in chloroform (600 lit) by heating to 35-40° C., to which was added activated charcoal (7.5 kg) and the mixture was refluxed for 30 min. The mixture was filtered and filtrate was concentrated to give product having purity between 97-99%.

References:

US2007/185177,2007,A1 Location in patent:Page/Page column 8

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