Process for preparing N,N'-carbonyldiazoles

Details Process for preparing N,N'-carbonyldiazoles Process for preparing N,N'-carbonyldiazoles

2006-09-05

2006-09-05

McKane, Joseph K. (Department: 1626)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C548S341500, C548S266600, C548S305700, C548S365400

Reexamination Certificate

active

07102012

ABSTRACT:
A process is provided for preparing N,N′-carbonyldiazoles by reacting azoles with phosgene in halogenated aliphatic hydrocarbon solvents, the entirety of the azole for reaction being introduced in the solvent, followed by the addition of phosgene.

REFERENCES:
patent: 6392057 (2002-05-01), Scherer et al.
patent: 6891045 (2005-05-01), Stamm et al.
patent: 1 033 210 (1956-12-01), None
patent: 0 692 476 (1994-07-01), None
patent: WO2004-EP13876 (2004-12-01), None
“Notiz zur Darstellung von 1.1'-Carbonyl-di-imidazol”, Staab, Heinz A., et al, Chem. Ber. 1963, 96, p. 3374.

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