3-step synthesis of pyrazolotriazole couplers and coupler...

Details 3-step synthesis of pyrazolotriazole couplers and coupler... 3-step synthesis of pyrazolotriazole couplers and coupler...

2006-05-09

2006-05-09

Saeed, Kamal A. (Department: 1626)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C548S375100

Reexamination Certificate

active

07041833

ABSTRACT:
A process and intermediate useful for forming a 1H-Pyrazolo[1,5-b][1,2,4]triazole compounds comprise the step of reacting a 1,5-diaminopyrazole bearing a substituent, bonded to one and only one of the amine nitrogens by an acyl or thioacyl group, with a dehydrating agent in the presence of an aprotic solvent.

REFERENCES:
patent: 5262542 (1993-11-01), Tang et al.
patent: 5723623 (1998-03-01), Clarke et al.
patent: 8-69096 (1996-03-01), None
Blake, et al. Synthesis and Chemistry of 3-tert-butyl-1,5-diaminopyrazole, Org. Biomol. Chem., vol. 1, pp. 4268-4274 (2003).

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