Process for the production of 2-amino-4-methyl-benzothiazole

Details Process for the production of 2-amino-4-methyl-benzothiazole Process for the production of 2-amino-4-methyl-benzothiazole

1981-03-27

1984-03-06

Coughlan, Jr., Paul M.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D27782

Patent

active

044355769

ABSTRACT:
Process for the production of 2-amino-4-methylbenzothiazole from o-tolylthiourea using chlorine as a ring closure reactant. The reaction is carried out without a catalyst. By the use of methylene chloride as a solvent, no ring chlorination takes place. The product is removed from the resultant HCl-salt form by treatment with sodium hydroxide solution.

REFERENCES:
patent: 1911085 (1933-05-01), Lubs
patent: 1984885 (1934-12-01), Lubs et al.
patent: 4035379 (1977-07-01), Fuchs
The New Encyclopedia Britannica, Micropaedia, vol. 1, p. 247 (1974).
Jackson et al., J. Chem. Soc. (C), (1969), pp. 268-272.

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