Process for the production of 3-amino-isoxazoles

Details Process for the production of 3-amino-isoxazoles Process for the production of 3-amino-isoxazoles

C - Chemistry, Metallurgy

07

D

260/311.9

C07D 261/14 (2006.01)

Patent

CA 1089473

PROCESS FOR THE PRODUCTION OF 3-AMINOISOXAZOLES ABSTRACT 3-Aminoisoxazoles of the formula: Image (wherein R is C1-C6 alkyl, phenyl or halo-phenyl) are prepared by reacting a .beta.-ketonitrile of the formula: R-CO-CH2CN (wherein R is as defined above) with a compound of the formula: HY (wherein Y is C1-C6 alkoxy or C1-C6 alkylthio) in the presence of an acid in a solvent to give an iminium salt of the formula: Image (wherein X is the residue of said acid; R and Y are each as defined above) and further reacting the iminium salt with hydroxylamine in an inert solvent.

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