Process for producing 3-unsubstituted...

Details Process for producing 3-unsubstituted... Process for producing 3-unsubstituted...

2007-08-14

2007-08-14

Saeed, Kamal A. (Department: 1626)

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

Organic compounds

Nitriles

C548S100000

Reexamination Certificate

active

10500599

ABSTRACT:
The present invention is to provide a process for preparing a 3-unsubstituted-5-amino-4-nitrosopyrazole compound represented by the formula (1):wherein R1represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group each of which may have a substituent(s),which comprises cyclizing a 3-hydrazono-2-hydroxyiminopropionitrile compound represented by the formula (2):wherein R1has the same meaning as defined above, synthetic intermediates thereof and a process for preparing these intermediates.

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Andtianov, V.G. et al., Rearrangements of 1-oxa-2-azoles. 5. Synthesis of α-hydroximinodimethylhydrazones of 1,2,4-oxadiazolyl-3-glyoxal and their rearrangement, Khimiya Geterotsiklicheskikh Soedinenii, (1991), vol. 7, pp. 976-978. Accession No. 1992:128796, CA Abstract No.: 116:128796.

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