申请人:Bayer Aktiengesellschaft
公开号:US04713456A1
公开(公告)日:1987-12-15
A process for the preparation of a 5-acylpyrimidine of the formula ##STR1## in which R is an organic radical comprising reacting a methyl ketone of the formula R--CO--CH.sub.3 in a first stage with a formylating reagent in the presence of a base to form an enolketone of the formula R--CO--CH.dbd.CH--OR.sup.10 in which R.sup.10 represents hydrogen or a base radical, thereafter reacting the enolketone in 2nd and 3rd stages with formamidine or a formamidine salt, and with an amino-formylating agent, and, in a 4th stage heating to cyclize the compound formed. The end products, some of which are new, are intermediates for making herbicides.
一种制备式为##STR1##的5-酰基嘧啶的方法,其中R为包含有机基团的甲基酮R--CO--CH.sub.3在第一阶段与一种酰基试剂在碱的存在下发生反应,形成一种烯基酮R--CO--CH.dbd.CH--OR.sup.10,其中R.sup.10代表氢或一种基团,然后在第二和第三阶段将烯基酮与甲酰胺或甲酰胺盐以及氨基酰化试剂反应,最后在第四阶段加热使化合物环化。最终产物中的一些是新的,可用作制造除草剂的中间体。