5-(Dimethylamino)-1-naphthalenesulfonic acid synthesis
- Product Name:5-(Dimethylamino)-1-naphthalenesulfonic acid
- CAS Number:4272-77-9
- Molecular formula:C12H13NO3S
- Molecular Weight:251.3
Yield:4272-77-9 95.6%
Reaction Conditions:
with ammonia;sodium carbonate in water at 20; for 6 h;
Steps:
1.1 1. Synthetic Dan Sulfonic Acid
Add lauren acid (223g) to 500In a mixed solvent of sodium carbonate aqueous solution and ammonia(Contains 10% sodium carbonate and 1% ammonia,Quality score),Stir quickly to obtain a uniform suspension.then,While stirring, cool the suspension to below 5°C,Then dimethyl sulfate (126g) was added dropwise to the suspension,React at room temperature for 6 hours.Neutralize with hydrochloric acid to a pH of 6,Cool to 15,White crystals are precipitated.The crystal was recrystallized in petroleum ether and ethyl acetate to obtain 240Cedanosulfonic acid,The yield was 95.6%.
References:
CN111349028,2020,A Location in patent:Paragraph 0029-0035
1415743-27-9
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4272-77-9
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4272-77-9
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