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ChemicalBook CAS DataBase List 4-chloro-2-methyl-5-(methylsulfonyl)Benzoic acid
176309-00-5

4-chloro-2-methyl-5-(methylsulfonyl)Benzoic acid synthesis

3synthesis methods
-

Yield:176309-00-5 67%

Reaction Conditions:

Stage #1: 4-chloro-2-methylbenzoic acidwith chlorosulfonic acid at 15 - 115;
Stage #2: with hydrogenchloride;sodium hydroxide;sodium sulfite in water; pH=9 - 1; for 4 h;
Stage #3: methyl iodidewith sodium hydroxide in methanol;water at 40; pH=9;

References:

US6350904,2002,B1 Location in patent:Page column 8, 9