Method for production of 4-methyl-5-(2-aminoethyl)-thiomethyl)-i

Details Method for production of 4-methyl-5-(2-aminoethyl)-thiomethyl)-i Method for production of 4-methyl-5-(2-aminoethyl)-thiomethyl)-i

1989-04-25

1990-04-10

Schwartz, Richard A.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D23364

Patent

active

049162330

ABSTRACT:
4-Methyl-5-[(2-aminoethyl)-thiomethyl]-imidazole can be effectively produced by causing 4-methylimidazole or a salt thereof to react with at least one member selected from the group consisting of (a) a formaldehyde adduct of cysteamine, (b) 2-aminoethanethiol sulfuric acid and formaldehyde or a formaldehyde oligomer, and (c) thiazolidine or a salt thereof, in the presence of a mineral acid, removing a portion of reaction liquid out of the reaction system while maintaining molar concentration of 4-methyl-5-[(2-aminoethyl)-thiomethyl]-imidazole in the reaction system not exceeding 70 mol % based on total mol numbers of 4-methylimidazole and 4-methyl-5-[(2-aminoethyl)-thiomethyl]-imidazole, then separating a liquid containing 4-methyl-5-[(2-aminoethyl)-thiomethyl]-imidazole from the removed portion of reaction liquid, and recycling the remainder into the reaction system.

REFERENCES:
patent: 3950333 (1976-04-01), Durant et al.
patent: 4049672 (1977-09-01), Durant et al.
patent: 4189592 (1980-02-01), Halbritter

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