Process for preparing hydroxyalkylaminosulfonic acids

Details Process for preparing hydroxyalkylaminosulfonic acids Process for preparing hydroxyalkylaminosulfonic acids

C - Chemistry, Metallurgy

07

D

260/491.4, 260/5

C07D 231/06 (2006.01) A61K 31/38 (2006.01) A61K 31/40 (2006.01) A61K 31/415 (2006.01) C07D 207/16 (2006.01)

Patent

CA 1159083

PROCESS FOR PREPARING HYDROXYALKYLAMINOSULFONIC ACIDS Abstract of the Disclosure The invention provides a process for preparing hydroxy- alkylaminosulfonic acids, known to be useful for a variety of purposes. The process comprises reacting a hydroxy- alkylamine of the formula: Image (II) wherein R1 is a C1-C20 hydroxyalkyl group optionally containing -O- or -COO- in the alkyl chain and R2 is a hydrogen atom, a C1-C20 hydroxyalkyl group optionally containing -O- or -COO- in the alkyl chain or a lower alkyl group; with an alkali metal salt of an .alpha.,.beta.- unsaturated sulfonic acid of the formula: Image (III) wherein R3 is a hydrogen atom or a methyl group and M is an alkali metal; followed by elimination of the alkali metal to give a hydroxyalkylaminosulfonic acid of the formula: Image (I) wherein R1 and R3 are each as defined above and R2 is a hydrogen atom, a C1-C20 hydroxyalkyl group optionally containing -O- or -COO- in the alkyl chain, a lower alkyl group or a group of the formula: Image wherein R3 is as defined above. This process is quite straightforward and can be carried out with high yield.

366941

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