Patent ID: 6664422
Filing Date: 2003-12-16
Classification: C07C

Abstract:
A process for preparing an oxime of formula II whereinR1 is hydrogen, fluoro or chloro, and R2 is methyl, ethyl, methoxy, ethoxy, trifluoromethyl, trifluoromethoxy, cyano, fluoro, chloro or bromo, comprising the steps of diazotizing an aniline of formula VI â€ƒreacting the resulting diazonium salt with isopropenylacetate of formula X â€ƒreacting the resulting ketone of formula XI â€ƒwith an organic nitrite in the presence of hydrogen chloride, â€ƒmethylating the resulting ketooxime of formula VIII â€ƒwith a methylating agent, and reacting the resulting O-methyl ketooxime of formula IX â€ƒwith hydroxylamine.