METHOD FOR THE PRODUCTION OF OXAZOLES BY CONDENSING AROMATIC ALDEHYDES WITH A-KETOXIMES TO N-OXIDES AND THEN REACTING THE SAME WITH ACTIVATED ACID DERIVATIVES

摘要

The invention is related to a process for preparing compounds of the formula IV by means of conversion of aromatic aldehydes of the formula I usingα-ketoximes of the formula II via N-oxides of the formula III to halomethyloxazoles of the formula IV, wherein R1, R2, R3, R4, R5, R6, R7, R8, X1, X2, X3, o, n1 and n2 are as defined herein.