This invention relates to a process for the preparation of pyrimidinone compounds of the formula ##STR1## wherein Ar is an optionally substituted aryl or heteroaromatic moiety, R.sup.3 is an optionally substituted alkyl, alkenyl or alkynyl, R.sup.5 is a hydrogen atom, halo, cyano or an optionally substituted alkyl, alkenyl, alkynyl, alkoxy or alkylthio, and R.sup.6 is a hydrogen atom, cyano, or an optionally substituted alkyl, cycloalkyl, alkenyl, alkynyl, aryl, aralkyl or heteroaryl. The process comprises reaction of an amidine and a malonic acid derivative to give a hydroxypyrimidinone followed by conversion of the resulting hydroxypyrimidinone to a sulfonyloxypyrimidinone followed by reaction of the resulting sulfonyloxypyrimidinone with an organometallic reagent to give the desired pyrimidinone. The hydroxypyrimidinones, wherein R.sup.6 is hydroxy and sulfonyloxypyrimidinones wherein R.sup.6 is a substituted sulfonyloxy moiety, are themselves new and useful intermediates in the preparation of the desired pyrimidinones.
这项发明涉及一种制备
嘧啶酮化合物的过程,其
化学式为##STR1##其中Ar是一个可选择取代的芳基或杂环芳基,R.sup.3是一个可选择取代的烷基、烯基或炔基,R.sup.5是一个氢原子、卤素、
氰基或一个可选择取代的烷基、烯基、炔基、烷氧基或
硫代烷基,R.sup.6是一个氢原子、
氰基,或一个可选择取代的烷基、环烷基、烯基、炔基、芳基、芳基烷基或杂环芳基。该过程包括使
脲酰胺和
丙二酸衍
生物反应,得到
羟基嘧啶酮,然后将所得的
羟基嘧啶酮转化为磺酰氧基
嘧啶酮,随后将所得的磺酰氧基
嘧啶酮与有机
金属试剂反应,得到所需的
嘧啶酮。其中R.sup.6为羟基的
羟基嘧啶酮和R.sup.6为取代磺酰氧基的磺酰氧基
嘧啶酮本身是制备所需
嘧啶酮的新颖有用的中间体。