A process for the preparation of a heteroaryloxyacetamide of the formula ##STR1## in which R is a 5 membered heterocycle which may be benzo-fused, and R.sup.1 and R.sup.2 each independently is hydrogen, alkyl, alkenyl, alkynyl, cycloalkyl or cycloalkenyl, halogenoalkyl, alkoxyalkyl, alkoxy, aralkyl or aryl, or R.sup.1 and R.sup.2, together with the nitrogen atom to which they are bonded, form a heterocycle, which comprises reacting a sulphonylated heteroaromatic of the formula R--SO.sub.2 --R' in which R' is lower alkyl or benzyl, with an .alpha.-oxyacetamide of the formula ##STR2## 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.degree. C. to +150.degree. C. The products are known herbicides.
一种制备式为##STR1##的杂环氧基乙酰胺的方法,其中R是一个5元杂环,可以被苯并,R.sup.1和R.sup.2分别独立地是氢,烷基,烯基,炔基,环烷基或环烯基,卤代烷基,烷氧基烷基,烷氧基,芳基烷基或芳基,或R.sup.1和R.sup.2与它们所连接的氮原子一起形成一个杂环,其中包括用式R-SO.sub.2-R'的磺酰化杂
芳烃和式##STR2##的α-氧乙酰胺在
无机碱作为酸受体和溶剂作为稀释剂的存在下,在约-50°C至+150°C的温度下反应。产物是已知的
除草剂。