会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 9. 发明申请
    • METHOD FOR PRODUCING 3-METHYL 2-BUTENAL ACETALS
    • 用于生产缩醛3-甲基-2-丁烯醛
    • WO99006344A1
    • 1999-02-11
    • PCT/EP1998/004479
    • 1998-07-20
    • C07B61/00C07C41/42C07C41/56C07C43/303
    • C07C41/56C07C43/303
    • The invention relates to a method for producing acetals of formula (I) wherein a) the Rs represent independently from each other a C1-C20 alkyl or C3-C20 alkyl or C3-C20 alkenyl radical or b) both radicals R jointly form units of an optionally C1-C10 alkyl substituted 5-7 membered cyclic acetal, wherein 3-methyl-2-butenal is reacted in the presence of amidosulphonic acid, an N-(C1-C8-alkyl) amidosulphonic acid or an N, N-Di(C1-C8-alkyl)amidosulphonic acid as a catalyst with, in case (a), (a1) an alcohol of general formula (IIa) R-OH wherein R has the meaning cited in (a), a2) an orthoester of general formula (III) HC-(OR)3 wherein R has the meaning cited in (a) or a3) a mixture of an alcohol of general formula (IIa) and an orthoester of general formula (III), and in case (b) with an alcohol of general formula (IIb) wherein m is a number between 2 and 4 and a methylene group in alcohol (IIb) can be substituted by a C1-C10-alkyl group.
    • 中,在一个)R提供了一种用于制备式(I)的乙缩醛的方法,独立地是一个C1-C20烷基或C3至C20链烯基基团,或b)的两个基团R一起任选C1的各成员 形式C10烷基取代的5-至7-元环状缩醛通过3-甲基-2-丁烯醛在氨基磺酸的存在下,一个N-(C1至C8烷基)或氨基磺酸(一个N,N-二C1反应 至C8烷基)氨基磺酸与催化剂(在情况a):a1)的通式的醇(IIa)的R-OH,其中R具有下一个提到的含义); a2)中的通式的原酸酯(III)HC-(OR)3,其中R具有下一个提到的含义)或A3)通式(IIa)中的醇的混合物和通式的原酸酯(III) 和在情况(b)与通式(IIb)的HO-(CH 2)的醇M-OH,其中m是一个C 1 -C 10的数为2至4,且在醇(IIb)的亚甲基基团 烷基可以被取代,进行反应。