| 摘要 |
A process for the preparation of a heteroaryloxyacetamide of the formula <IMAGE> in which R is a 5 membered heterocycle which may be benzo-fused, and R1 and R2 each independently is hydrogen, alkyl, alkenyl, alkynyl, cycloalkyl or cycloalkenyl, halogenoalkyl, alkoxyalkyl, alkoxy, aralkyl or aryl, or R1 and R2, together with the nitrogen atom to which they are bonded, form a heterocycle, which comprises reacting a sulphonylated heteroaromatic of the formula R-SO2-R' in which R' is lower alkyl or benzyl, with an alpha -oxyacetamide of the formula <IMAGE> in which R'' is hydrogen or acyl, in the presence of an inorganic base as an acid acceptor and of solvent as a diluent at a temperature of about -50 DEG C. to +150 DEG C. The products are known herbicides.
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