4-Amino-5-(ethylsulfonyl)-2-methoxybenzoic Acid
4-Amino-5-(ethylsulfonyl)-2-methoxybenzoic Acid (CAS: 71675-87-1) is an aromatic acid bearing amino, methoxy and ethylsulfonyl substituents, supplied as a white to off-white crystalline powder.
The ready-made substitution pattern makes it the direct precursor to the benzamide portion of amisulpride, since the carboxyl group can be coupled with an aminomethylpyrrolidine after activation.
Commercial assay is 99% with controlled isomer and water content, packed in drums or bags for API manufacture.
• Amisulpride manufacture: the direct acid precursor for amidation with 2-(aminomethyl)-1-ethylpyrrolidine.
• Pharmaceutical process chemistry: a defined, low-impurity intermediate that reduces purification burden.
• Impurity standards: used as a reference substance for amisulpride related-compound testing.
• Custom synthesis: a scaffold for other 4-amino-5-sulfonyl-2-alkoxybenzamides.
Product Name: 4-Amino-5-(ethylsulfonyl)-2-methoxybenzoic Acid
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