512-42-5Relevant articles and documents
Preparation method of 4-methylanisole
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Paragraph 0041-0043; 0044-0047; 0052-0058, (2019/08/20)
The invention discloses a preparation method of 4-methylanisole. The method includes: using p-cresol and sodium hydroxide as the raw materials to prepare p-methylphenol sodium; allowing the p-methylphenol sodium and dimethyl sulfate to have methylation in a nonpolar solvent to prepare the 4-methylanisole and byproduct sodium methylsulfate; allowing the p-methylphenol sodium and the byproduct sodium methylsulfate to have reaction in a polar solvent to prepare the 4-methylanisole and sodium sulfate. The method has the advantages that the 4-methylanisole is prepared through the three-step reaction, the utilization rate of the dimethyl sulfate is increased, and wastewater zero discharge is achieved.
Process for the preparation of aminomethylene compounds
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, (2008/06/13)
Aminomethylene compounds of the formula STR1 can be prepared by reaction of C-H acid compounds of the formula STR2 with salts of the formula STR3 in the presence of alkoxides of the formula where the radicals R1 to R4, R7, R10, X- and M1 have the meaning mentioned in the description.