Preparation of 2-amino-4-alkoxythiazoles being negatively substi

Details Preparation of 2-amino-4-alkoxythiazoles being negatively substi Preparation of 2-amino-4-alkoxythiazoles being negatively substi

1997-04-08

1998-09-22

Gerstl, Robert

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548184, C07D27754

Patent

active

058115544

ABSTRACT:
PREPARATION OF 2-AMINO-4-ALKOXYTHIAZOLES BEING NEGATIVELY SUBSTITUTED IN THE 5 POSITION
According to the present invention, 2-amino-4-alkoxythiazoles substituted with an electron withdrawing group in the 5-position are prepared by reacting an iminoether with a halogenating agent and thiourea. Alternatively, the 2-amino-4-alkoxythiazoles are prepared by reacting an iminoether with sodium thiocyanate and an oxidizing agent. According to a further aspect of the invention, novel azo dyes are prepared from such 2-amino-4-alkoxythiazoles having a phosphonyl group in the 5 position.

REFERENCES:
patent: 4324899 (1982-04-01), Frishberg

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