| abstract |
- 8 - 0.2. 0053/42205 Abstract of the Disclosure: The preparation of sulfate betaines I I where R1 and R2 are each identical or different and each is a saturated straight-chain or branched alkyl of 1 to 22 carbon atoms, cycloalkyl of 5 to 7 carbon atoms in the ring, phenyl or naphthyl, or aralkyl of 7 to 12 carbon atoms in total, or the two R1 radicals form, together with the nitrogen, a 5- or 6-membered heterocyclic ring which can contain one or more other hetero atoms and a fused-on benzene ring, where R2 is alkyl of 1 to 4 carbon atoms, or the two R1 radicals form, together with the nitrogen and R2 a 5- or 6-membered unsaturated heterocyclic ring which can contain one or more other hetero atoms and a fused-on benzene ring, and R3 and R4 are identical or different and R3 is hydrogen or alkyl of 1 to 7 carbon atoms, and R4 is hydrogen, alkyl of 1 to 20 carbon atoms or phenyl, where R3 and R4 may be interchanged, entails reacting a tertiary nitrogen base II II with an alkylene carbonate III III and with sulfuric acid at from 80 to 220°C. |