METHODS FOR HIGHLY SELECTIVELY O-ALKYLATING AMIDE COMPOUNDS WITH THE USE OF COPPER SALTS
申请人:NIPPON SODA CO., LTD.
公开号:EP1070692A1
公开(公告)日:2001-01-24
Compounds having one or more structures represented by general formula (I) as partial structure thereof, which are typified by pyrimidone and pyridone compounds, have two or more reaction sites in alkylation reactions. Accordingly, there is no process for producing O-alkylated products of these compounds at a high selectivity or such processes, if any, are applicable exclusively to those having limited structures. A process for selectivity O-alkylating such a compound as described above by converting it into the copper salt by using a monovalent copper compound such as copper suboxide and then reacting it with an alkylating agent having a leaving group in the presence of a phosphorus compound such as a phosphite. Pyrimidyloxy derivatives or pyridyloxy derivatives obtained by this reaction is useful as intermediates of pesticides or drugs.
具有通式(I)所代表的一个或多个结构的化合物,其部分结构以嘧啶酮和吡啶酮化合物为典型,在烷基化反应中具有两个或多个反应位点。因此,目前还没有一种工艺能以高选择性生产这些化合物的 O-烷基化产物,或者即使有这种工艺,也只适用于结构有限的化合物。将上述化合物进行选择性 O-烷基化的方法是:使用一价铜化合物(如亚氧化铜)将其转化为铜盐,然后在磷化合物(如亚磷酸酯)存在下与具有离去基团的烷基化剂反应。通过这种反应得到的嘧啶氧基衍生物或吡啶氧基衍生物可用作农药或药物的中间体。