Process for manufacturing 5-cyano-4-lower alkyloxazoles

Details Process for manufacturing 5-cyano-4-lower alkyloxazoles Process for manufacturing 5-cyano-4-lower alkyloxazoles

1991-12-05

1993-05-25

Morris, Patricia L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D26334

Patent

active

052141624

ABSTRACT:
The invention is concerned with a process for the manufacture of 5-cyano-4-lower alkyl-oxazoles by dehydrating a 5-carbamoyl-4-lower alkyl-oxazole in the gas phase in the presence of a heterogeneous catalyst based on silicon dioxide and in the presence of an inert solvent. The heterogeneous catalyst used is formed SiO.sub.2 or SiO.sub.2 doped with an oxide of V, Mo, Fe, Co and/or Zn. An N-lower alkyl-pyrrolidone is preferably used as the inert solvent.

REFERENCES:
patent: 2901504 (1959-08-01), Aries
patent: 3222374 (1965-12-01), Chase
patent: 4011234 (1977-03-01), Hoffman-Paquotte
patent: 4026901 (1977-05-01), Coffen
patent: 4093654 (1978-06-01), Coffen
patent: 4255584 (1981-03-01), Hoffmann-Paquotte
patent: 4772718 (1988-09-01), Nosberger
Stepanova et al., Chem. Abstracts, 85:519 No. 143020x (1976).

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