Process for preparing alkylidene-substituted -1, 4-dions derivatives
    1.
    发明申请
    Process for preparing alkylidene-substituted -1, 4-dions derivatives 失效
    制备亚烷基取代的1,4-二取代衍生物的方法

    公开(公告)号:US20050113599A1

    公开(公告)日:2005-05-26

    申请号:US10491559

    申请日:2003-07-25

    摘要: 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 carbonate of metal M or of a compound of formula MTj such as K2CO3 or KHCO3.

    摘要翻译: 制备式(Ia)或(Ib)的单亚烷基取代的1,4-二醇衍生物或(Ia)和(Ib)的混合物的方法:其中:R 1, 彼此相同或不同的“2”和“3”是氢原子或C 1 -C 20烃基 组别:彼此相同或不同的T 1和T 2都是OR 4,R 4, 4号,4号或4号4号,4号,4号,4号。 或T 1和T 2可以稠合在氧原子或NR 4 O 4基团中; 所述方法包括使式(II)化合物与式(IIIa)或(IIIb)化合物在相对于式(IIIa)或(IIIb)化合物的至少一当量存在下反应的步骤: 金属M的碳酸盐或式MT的化合物如K 2 CO 3或KHCO 3 3的碳酸盐。