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    • 1. 发明授权
    • Preparation of 3-arylacrylic acids and their derivatives
    • 3-芳基丙烯酸及其衍生物的制备
    • US5359122A
    • 1994-10-25
    • US193872
    • 1994-02-08
    • Michael HuellmannJosef GnadRainer Becker
    • Michael HuellmannJosef GnadRainer Becker
    • C07C57/44C07C59/64C07C67/46C07C69/734
    • C07C59/64C07C57/44C07C67/46
    • The preparation of 3-arylacrylic acids and their derivatives I ##STR1## where Ar is aryl which can additionally have substituents which do not react with ketene and are stable under the conditions of the reaction described below, andR.sup.1 is hydrogen, an alkali metal, an alkaline earth metal, ammonium or C.sub.1 -C.sub.20 -alkyl,comprises a first stage in which a dialkyl acetal of an aromatic aldehyde of the formula II ##STR2## where R.sup.2 is C.sub.1 -C.sub.4 -alkyl, is reacted with ketene of the formula CH.sub.2 .dbd.C.dbd.O in the presence of catalytic amounts of a protic or Lewis acid to give a 3-arylpropionic acid derivative of the formula III ##STR3## and a second stage in which this intermediate III is reacted in the presence of acid or base and, in the case where R.sup.1 is C.sub.1 -C.sub.20 -alkyl, additionally with a C.sub.1 -C.sub.20 -alkanol to give the final product I.
    • 3-芳基丙烯酸及其衍生物的制备I(I)其中Ar是可以另外具有不与乙烯酮反应并且在下述反应条件下稳定的取代基的芳基,R 1是氢, 碱金属,碱土金属,铵或C 1 -C 20烷基,包括其中R 2为C 1 -C 4 - 烷基的式II的芳族醛的二烷基缩醛反应的第一阶段 在催化量的质子或路易斯酸存在下,式CH 2 = C = O的烯酮,得到式III的3-芳基丙酸衍生物(III),其中该中间体III为 在酸或碱的存在下反应,在R1为C1-C20烷基的情况下,另外加入C1-C20链烷醇,得到最终产物I.
    • 7. 发明授权
    • Preparation of N-alkenylpyrrolidones
    • N-烯基吡咯烷酮的制备
    • US5410070A
    • 1995-04-25
    • US188206
    • 1994-01-27
    • Lothar FranzMichael Huellmann
    • Lothar FranzMichael Huellmann
    • C07B61/00C07D207/26C07D207/267
    • C07D207/267
    • Process for the preparation of N-alkenylpyrrolidones of the general formula ##STR1## in which R denotes hydrogen or C.sub.1 -C.sub.20 alkyl, by the reaction of an N-alkylpyrrolidone of the general formula ##STR2## in which R has the aforementioned meanings, and x and Y stand for OH, C.sub.1 -C.sub.20 alkoxy or C.sub.2 -C.sub.20 alkoxycarbonyl, provided that one of the two radicals x and denotes hydrogen, at temperatures ranging from 200.degree. to 600.degree. C. and pressures ranging from 0.1 to 5 bar, wherein the process is carried out in the presence of an acid heterogenous catalyst except for an oxide of a Group IIb, Group IIIb, Group IVb, and Group VIb metal.
    • 制备通式为(Ⅰ)的N-烯基吡咯烷酮的方法,其中R表示氢或C 1 -C 20烷基,通过其中R具有通式为(II)的N-烷基吡咯烷酮 上述含义,x和Y表示OH,C 1 -C 20烷氧基或C 2 -C 20烷氧基羰基,条件是两个基团中的一个x表示氢,温度范围为200-600℃,压力范围为0.1至5 其中所述方法在除了IIb族,IIIb族,IVb族和VIb族金属的氧化物之外的酸异种催化剂的存在下进行。