Process for producing of an aminoalkylsulfonic acid and a...

Details Process for producing of an aminoalkylsulfonic acid and a... Process for producing of an aminoalkylsulfonic acid and a...

2006-05-23

2006-05-23

O'Sullivan, Peter (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Sulfonic acids or salts thereof

Reexamination Certificate

active

07049464

ABSTRACT:
A process for producing an aminoalkylsulfonic acid of formula [2]:wherein R1and R2are each independently hydrogen, alkyl, aryl or aralkyl; and R3and R4are each independently hydrogen or alkyl, comprising reacting an aminoalkylsulfonate salt of formula [1]:wherein M is alkali metal, organic ammonium or ammonium ion; and R1to R4are as described above,an aqueous solution thereof, or a solution dissolving any one of them in a water-soluble organic solvent, selected from alcohols having 1 to 3 carbon, carboxylic acids having 2 to 12 carbon and dimethylformamide, with an organic acid; anda method of salt exchange for an aminoalkylsulfonate salt of formula [1′]:wherein M′ is alkali metal, organic ammonium or ammonium ion; and R1and R4are as described above, comprising reacting the aminoalkylsulfonate salt formula [2] with a hydroxide of formula [6]:in-line-formulae description="In-line Formulae" end="lead"?M′OH[6]in-line-formulae description="In-line Formulae" end="tail"?wherein M′ is as described above, in alcohol or water.

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