[EN] PROCESS FOR PREPARING ALKYLIDENE-SUBSTITUTED-1,4-DIONS DERIVATIVES<br/>[FR] PROCEDE DE PREPARATION DE DERIVES 1,4-DIONS SUBSTITUES PAR ALKYLIDENE
申请人:BASELL POLIOLEFINE SPA
公开号:WO2004014838A1
公开(公告)日:2004-02-19
A process for the preparation of a monoalkylidene substituted 1,4-dions derivatives of formula (Ia) or (Ib) or a mixture of (Ia) and (Ib): wherein: R1, R2 and R3, equal to or different from each other, are hydrogen atoms or C1-C20 hydrocarbon groups: T1 and T2, equal to or different from each other, are OR4. R4, NR42, SR4 or PR42; or T1 and T2 can be fused in an oxygen atom or a NR4 group; said process comprises the step of reacting a compound of formula (II), with a compound of formula (IIIa) or (IIIb), in the presence of at least one equivalent with respect to the compound of formula (IIIa) or (IIIb) of a salts of a base or a neutral base at a temperature higher than 70°C.
一种制备式(Ia)或(Ib)或(Ia)和(Ib)混合物的单烷基亚甲基取代的1,4-二酮衍生物的方法,其中:R1、R2和R3,相互相等或不同,是氢原子或C1-C20烃基;T1和T2,相互相等或不同,是OR4,R4、NR42、SR4或PR42;或T1和T2可以在一个氧原子或一个NR4基团中融合;所述方法包括在高于70°C的温度下,在化合物(II)和化合物(IIIa)或(IIIb)的存在下,与至少相对于化合物(IIIa)或(IIIb)的一个碱盐或中性碱的当量反应。