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    • 1. 发明授权
    • Preparation of 5-vinylpyrrolidones
    • 5-乙烯基吡咯烷酮的制备
    • US5496958A
    • 1996-03-05
    • US266141
    • 1994-06-27
    • Rolf FischerWerner HoffmannErnst LangguthHardo Siegel
    • Rolf FischerWerner HoffmannErnst LangguthHardo Siegel
    • C07D207/26C07D207/267
    • C07D207/267
    • A process for the preparation of a 5-vinylpyrrolidone of the formula ##STR1## wherein each of R.sup.1 and R.sup.2 is hydrogen or alkyl and R.sup.3 is preferably hydrogen but may further represent alkyl, cycloalkyl, aryl, alkylaryl, arylalkyl or a 5- to 6-membered aromatic or non-aromatic heterocyclic group containing 1 to 3 nitrogen atoms and/or an oxygen or sulfur atom, the process being carried out in two steps, first to react a 3-formylpropionic acid ester of the formula ##STR2## where each of R.sup.1 and R.sup.2 is hydrogen or C.sub.1 -C.sub.8 -alkyl, and R.sup.4 is hydrogen, alkyl, cycloalkyl, aryl, alkylaryl or arylalkyl, with a vinylymagnesium halide of the formulaCH.sub.2 .dbd.CH--Mg--X V,where X is chlorine, bromine or iodine, at a temperature of from -30.degree. to 100.degree. C., under a pressure from 0.001 to 10 bar and in a molar ratio of V:IV of from 0.3:1 to 3:1 to obtain as an intermediate product a gamma-vinylbutyrolactone of the formula ##STR3## where R.sup.1 and R.sup.2 have the abovementioned meaning; and then reacting said intermediate of the formula II with ammonia or a primary amine of the formulaR.sup.3 --NH.sub.2 III,where R.sup.3 has the abovementioned meaning, at a temperature of from 150.degree. to 350.degree. C. and under a pressure of from 0.1 to 200 bar.
    • 制备式I的5-乙烯基吡咯烷酮的方法,其中R1和R2各自为氢或烷基,R3优选为氢,但可进一步代表烷基,环烷基,芳基,烷基芳基,芳基烷基或5-至 含有1至3个氮原子和/或氧或硫原子的6元芳族或非芳族杂环基,该方法分两个步骤进行,首先使式(IV)的3-甲酰基丙酸酯与式 其中R1和R2各自为氢或C1-C8-烷基,R4为氢,烷基,环烷基,芳基,烷基芳基或芳基烷基,与式CH2 = CH-Mg-XV的卤化镁,其中X为氯 ,溴或碘,在-30℃至100℃的温度下,在0.001至10巴的压力下,V:IV的摩尔比为0.3:1至3:1,以获得中间体 产生式为“IMAGE”II的γ-乙烯基丁内酯,其中R1和R2具有上述含义; 然后使式II的中间体与式(III-NH2)III的氨或伯胺反应,其中R 3具有上述含义,在150℃至350℃的温度和0.1至 200吧。
    • 5. 发明授权
    • Method for producing cyclopentanone
    • 环戊酮生产方法
    • US06429339B1
    • 2002-08-06
    • US09700365
    • 2000-11-15
    • Shelue LiangRolf FischerFrank SteinJoachim Wulff-Döring
    • Shelue LiangRolf FischerFrank SteinJoachim Wulff-Döring
    • C07C4500
    • B01J23/10C07C45/48C07C49/395
    • A process for preparing cyclopentanone by reacting adipic esters of the formula R1OOC—(CH2)4—COOR2  I where R1 and R2 are each alkyl having from 1 to 12 carbon atoms, cycloalkyl having 5 or 6 carbon atoms, aralkyl or aryl and R2 may additionally be hydrogen, in the presence of oxidic catalysts comprises reacting adipic esters of the formula I having less than 5% by weight of by-products other than adipic esters in the gas phase in the presence of water, a carrier gas and a) from 0.01 to 10% by weight of at least one metal oxide selected from the first or second main group of the periodic table or from the group of the rare earth metals on titanium dioxide or zirconium dioxide as catalyst support, or b) from 0.01 to 50% by weight of at least one metal oxide selected from the second main group of the periodic table on zink oxide as catalyst support.
    • 通过使式R 1和R 2的己二酸酯反应制备环戊酮的方法各自是在氧化催化剂存在的情况下,可以另外为氢,其中R 1和R 2各自为具有1至12个碳原子的烷基,具有5或6个碳原子的环烷基或芳基, 包括使式I的己二酸酯在水,载气的存在下,在气相中具有小于5重量%的除己二酸酯之外的副产物,和(ii)0.01至10重量%的至少一种金属 氧化物,其选自周期表的第一或第二主族,或者来自稀土金属的二氧化钛或二氧化锆的组,作为催化剂载体,orb)为0.01至50重量%的至少一种选自 氧化锌作为催化剂载体的周期表第二主要组。