Process for the preparation of the sulfate salt of 2-amino-5-alk

Details Process for the preparation of the sulfate salt of 2-amino-5-alk Process for the preparation of the sulfate salt of 2-amino-5-alk

Filed on

1981-06-08

Date issued

1983-02-22

Examiner

Lee, Mary C.

Patent Class

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

SubClass

Organic compounds

SubSubClass

Heterocyclic carbon compounds containing a hetero ring...

Other Related Categories

C07D28512

Type

Patent

Status

active

Patent number

043749933

Description

ABSTRACT:
Disclosed is a novel process for the preparation of the sulfate salt of 2-amino-5-alkylthio-1,3,4-thiadiazoles, which comprises reacting 2,5-dithiobiurea with a dialkylsulfate. Derivatives of compounds produced by this novel process are useful as chemical synthetic intermediates in the preparation of organic dyes and pharmaceuticals.

REFERENCES:
patent: 2759947 (1956-08-01), Song et al.
patent: 2891961 (1959-06-01), Turner et al.
patent: 2966495 (1960-12-01), Song et al.
patent: 3033901 (1962-05-01), Song
patent: 3657215 (1972-04-01), Weaver et al.
patent: 3903099 (1975-09-01), Rathgeb
patent: 3929816 (1975-12-01), Rathgeb et al.
Bambas, Heterocyclic Compounds, pp. 143-153, (1952).
Elderfield; Heterocyclic Compounds, vol. 7, pp. 607-610, (1961).
Dala; Chem. Abs., vol. 53: 18947c, (1958).

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