Preparation of caprolactam from 6-aminocapronitrile
    42.
    发明授权
    Preparation of caprolactam from 6-aminocapronitrile 失效
    从6-氨基己腈制备己内酰胺

    公开(公告)号:US5693793A

    公开(公告)日:1997-12-02

    申请号:US707476

    申请日:1996-09-05

    CPC分类号: C07D201/12 C07D201/08

    摘要: A process for preparing caprolactam by cyclization of 6-aminocapronitrile in the presence of water at elevated temperature and in the presence or absence of a catalyst and a solvent, comprises a) removing from the cyclization reaction effluent ("reaction effluent I") caprolactam and all components boiling higher than caprolactam ("high boilers"), b) treating the high boilers of stage a) with phosphoric acid and/or polyphosphoric acid at from 200 to 350.degree. C. to obtain a reaction effluent II, and c) removing caprolactam formed and any 6-aminocapronitrile from reaction effluent II of stage b) to obtain separation from unconverted high boilers and acid used.

    摘要翻译: 在高温存在下和在存在或不存在催化剂和溶剂的情况下,通过6-氨基己腈的环化制备己内酰胺的方法包括:a)从环化反应流出物(“反应流出物I”)中除去己内酰胺和 所有组分沸点高于己内酰胺(“高锅炉”),b)用磷酸和/或多磷酸在200至350℃下处理阶段a)的高锅炉以获得反应流出物II,和c)除去 己内酰胺和来自阶段b)的反应流出物II的任何6-氨基己腈得到与未转化的高锅炉和酸的分离。

    Preparation of polytetrahydrofuran
    43.
    发明授权
    Preparation of polytetrahydrofuran 失效
    聚四氢呋喃的制备

    公开(公告)号:US5641857A

    公开(公告)日:1997-06-24

    申请号:US545753

    申请日:1995-11-07

    摘要: Polytetrahydrofuran or polytetrahydrofuran monoesters of C.sub.1 -C.sub.20 -monocarboxylic acids or polytetrahydrofuran monoethers of monohydric C.sub.1 -C.sub.20 -alcohols, having an average molecular weight of from 250 to 10,000 Dalton and liquid at room temperature, are prepared by the cationic polymerization of tetrahydrofuran in the presence of a telogen by a process in which tetrahydrofuran is polymerized in the presence of water, 1,4-butanediol and/or polytetrahydrofuran having an average molecular weight of from 200 to 700 Dalton and/or of a C.sub.1 -C.sub.20 -monocarboxylic acid and/or of a monohydric C.sub.1 -C.sub.20 -alcohol with the aid of a catalytic amount of a zeolite catalyst which has an SiO.sub.2 /Al.sub.2 O.sub.3 molar ratio of from 4:1 to 100:1 and in which the population ratio P of the acid centers on the external surface of the zeolite to the total number of acid centers of the zeolite is 0.03/l or more.

    摘要翻译: PCT No.PCT / EP94 / 01403 Sec。 371日期:1995年11月7日 102(e)日期1995年11月7日PCT 1994年5月3日PCT公布。 WO92 / 26803 PCT出版物 日期1994年11月24日通过阳离子聚合制备平均分子量为250〜10,000道尔顿且在室温下为液体的C1-C20-一元羧酸或一元一-C 1 -C 20醇的聚四氢呋喃或聚四氢呋喃单酯 的四氢呋喃在四氢呋喃存在下,通过其中四氢呋喃在水存在下聚合的方法,1,4-丁二醇和/或平均分子量为200-700道尔顿的聚四氢呋喃和/或C1-C20 - 一元羧酸和/或一元醇C 1 -C 20醇,借助于催化量的SiO 2 / Al 2 O 3摩尔比为4:1至100:1的沸石催化剂,其中总体比P为 沸石外表面的酸中心与沸石的酸中心总数为0.03 / l以上。

    Catalytic process for eliminating carboxylic ester and acyl groups from
organic compounds
    44.
    发明授权
    Catalytic process for eliminating carboxylic ester and acyl groups from organic compounds 失效
    从有机化合物中消除羧酸酯和酰基的催化过程

    公开(公告)号:US5532386A

    公开(公告)日:1996-07-02

    申请号:US396606

    申请日:1995-03-01

    申请人: Rolf Fischer

    发明人: Rolf Fischer

    摘要: A process for preparing compounds of the formula I ##STR1## where: Y inter alia is ##STR2## where R.sup.3 is hydrogen or a C.sub.1 -C.sub.10 - hydrocarbon radical. R.sup.1 and R.sup.2, inter alia, are each, independently of one another, hydrogen, a C.sub.1 -C.sub.20 -hydrocarbon radical which optionally carries inert substituents or heteroaryl, wherein a compound of the formula II ##STR3## where Z is ##STR4## is reacted in the presence of catalytic amounts of a carbonic ester and of a nitrogenous base at from 100.degree. to 250.degree. C. under a pressure of from 0.01 to 100 bar.

    摘要翻译: 制备式I化合物(I)的方法,其中:Y特别是其中R 3是氢或C 1 -C 10 - 烃基。 R1和R2各自独立地彼此独立地为氢,任选地带有惰性取代基或杂芳基的C 1 -C 20烃基,其中Z为

    Preparation of 5-vinylpyrrolidones
    46.
    发明授权
    Preparation of 5-vinylpyrrolidones 失效
    5-乙烯基吡咯烷酮的制备

    公开(公告)号:US5496958A

    公开(公告)日:1996-03-05

    申请号:US266141

    申请日:1994-06-27

    IPC分类号: C07D207/26 C07D207/267

    CPC分类号: C07D207/267

    摘要: 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.

    摘要翻译: 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。

    Preparation of 3-(2-acyloxyethyl)-dihydro-2(3H)furanones
    47.
    发明授权
    Preparation of 3-(2-acyloxyethyl)-dihydro-2(3H)furanones 失效
    3-(2-酰氧基乙基) - 二氢-2(3H)呋喃酮的制备

    公开(公告)号:US5466831A

    公开(公告)日:1995-11-14

    申请号:US99232

    申请日:1993-07-29

    IPC分类号: C07D307/33 C07D307/12

    CPC分类号: C07D307/33

    摘要: A process for the preparation of 3-(2'-acyloxyethyl)-dihydro-2(3H)furanones of the general formula I ##STR1## in which R.sup.1 denotes C.sub.1 -C.sub.12 alkyl, C.sub.5 -C.sub.8 cycloalkyl, aryl, C.sub.7 -C.sub.12 aralkyl, or C.sub.7 -C.sub.12 alkylaryl, in which a 3-(2'-oxyethyl)-dihydro-2(3H)furanone of the general formula II ##STR2## in which R.sup.2 denotes C.sub.1 -C.sub.12 alkyl, C.sub.5 -C.sub.8 cycloalkyl, aryl, C.sub.7 -C.sub.12 aralkyl, or C.sub.7 -C.sub.12 alkylaryl is caused to react with a carboxylic acid, a carboxylic anhydride, and/or an acyl halide in the presence of an acid catalyst at temperatures of from 50.degree. to 250.degree. C. and pressures of from 0.1 to 100 bar.

    摘要翻译: 制备通式I,C5-C8环烷基,芳基,C7-C12芳烷基或C7-C12烷基芳基的3-(2'-酰氧基乙基) - 二氢-2(3H)呋喃酮的方法,其中3 - (2'-氧乙基) - 二氢-2(3H)呋喃酮,其中R 2表示C 1 -C 12烷基,C 5 -C 8环烷基,芳基,C 7 -C 12芳烷基或C 7 -C 12芳烷基, C12烷基芳基在酸催化剂存在下,在50-250℃,压力为0.1-100巴的条件下,与羧酸,羧酸酐和/或酰卤反应。

    Preparation of tetrahydropyran-4-carboxylic acid and esters thereof
    48.
    发明授权
    Preparation of tetrahydropyran-4-carboxylic acid and esters thereof 失效
    四氢吡喃-4-羧酸及其酯的制备

    公开(公告)号:US5371246A

    公开(公告)日:1994-12-06

    申请号:US110219

    申请日:1993-08-23

    CPC分类号: C07D309/08

    摘要: A process for the preparation of tetrahydropyran-4-carboxylic acid and esters thereof of the general formula I ##STR1## in which R.sup.1 denotes hydrogen, C.sub.1 -C.sub.6 alkyl, C.sub.5 -C.sub.8 cycloalkyl, or aryl by the reaction of a dihydro-2(3H)furanone of the general formula II ##STR2## in which R.sup.2 denotes hydrogen, C.sub.1 -C.sub.6 alkyl, or --CO--R.sup.3 andR.sup.3 denotes hydrogen or C.sub.1 -C.sub.6 alkyl, with water or an alcohol of the general formula IIIR.sup.1 --OH (III),in whichR.sup.1 has the aforementioned meaning,at temperatures ranging from 200.degree. to 350.degree. C. in the presence of a heterogenous acid catalyst, in which use is made of a fixed heterogenous acid catalyst.

    摘要翻译: 制备通式I的四氢吡喃-4-羧酸及其酯的方法,其中R 1表示氢,C 1 -C 6烷基,C 5 -C 8环烷基或芳基,其中二氢 -2(3H)呋喃酮,其中R 2表示氢,C 1 -C 6烷基或-CO-R 3,R 3表示氢或C 1 -C 6烷基,其中R 2表示氢或C 1 -C 6烷基, 在异种酸催化剂的存在下,在200〜350℃的温度范围内,通式III的R1-OH(Ⅲ),其中R 1具有上述含义,其中使用固定的异种酸催化剂。

    Preparation of 4-acetals of butene-1,4-dial and novel acetals of
butene-1,4-dial
    49.
    发明授权
    Preparation of 4-acetals of butene-1,4-dial and novel acetals of butene-1,4-dial 失效
    保护1,4-DIAL的4-乙酸丁酯和1,4-DIAL的新型乙烯的制备

    公开(公告)号:US5162552A

    公开(公告)日:1992-11-10

    申请号:US44805

    申请日:1987-04-30

    CPC分类号: C07C45/74 C07D319/06

    摘要: A process for the preparation of 4-acetals of butene-1,4-dial of the formula ##STR1## where R is an alkyl, alkenyl, cycloalkyl or aralkyl radical of 1 to 12 carbon atoms which may contain alkoxy groups, or the two radicals R together form an alkylene or alkenylene radical of 2 to 10 carbon atoms which may contain alkoxy groups, and R.sup.1 is an alkyl, alkenyl or alkynyl radical of 1 to 12 carbon atoms which may be substituted by cycloaliphatic, aromatic or heterocyclic radicals or by hydroxyl, ether, thioether, acyl, alkylamino, carboxyl or carbalkoxy groups, or is an unsubstituted or substituted aryl radical or an alkoxy, alkylthio or acyloxy group, wherein a glyoxal monoacetal of the formula ##STR2## is reacted with an aldehyde of the formulaR.sup.1 --CH.sub.2 --CHO IIIat up to 150.degree. C., and novel acetals of butene-1,4-dial.

    摘要翻译: 制备式Ia的1,4-缩醛的4-缩醛的方法,其中R是可以含有烷氧基的具有1至12个碳原子的烷基,烯基,环烷基或芳烷基,或 两个基团R一起形成可含有烷氧基的2至10个碳原子的亚烷基或亚烯基,R 1是可以被脂环族,芳族或杂环基取代的具有1至12个碳原子的烷基,烯基或炔基,或 通过羟基,醚,硫醚,酰基,烷基氨基,羧基或烷氧基,或者是未取代或取代的芳基或烷氧基,烷硫基或酰氧基,其中式II的乙二醛单缩醛与式 式R1-CH2-CHOⅢ在最高达150℃,新戊烯-1,4-表盘的缩醛。