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43 条记录 (耗时 0.017 秒)

    Method of preparation of oxalic acid esters and amides
    4.
    发明授权
    Method of preparation of oxalic acid esters and amides 失效
    草酸酯和酰胺的制备方法

    公开(公告)号：US4981963A

    公开(公告)日：1991-01-01

    申请号：US341750

    申请日：1989-04-21

    申请人： Giuseppe Messina ,  Giovanni M. Sechi ,  Loreno Lorenzoni ,  Giovanni Chessa

    发明人： Giuseppe Messina ,  Giovanni M. Sechi ,  Loreno Lorenzoni ,  Giovanni Chessa

    IPC分类号： C07C67/20 ,  B01J31/02 ,  C07B61/00 ,  C07C69/36 ,  C07C231/10 ,  C07C233/56 ,  C07D295/185

    CPC分类号： C07D295/185 ,  C07C231/10 ,  C07C233/56 ,  C07C67/20

    摘要： A new process is described for the preparation of oxalic acid esters and amides of general formula (I) ##STR1## wherein Z designates an --OR or --NR.sup.1 R.sup.2 group, wherein R represents substituted or unsubstituted alkyl, alkenyl, cycloalkyl, aryl, or aryl-alkyl, R.sup.1 is hydrogen or substituted or unsubstituted alkyl, alkenyl, cycloalkyl, aryl, or aryl-alkyl, R.sup.2 represents substituted or unsubstituted alkyl, alkenyl, cycloalkyl, aryl, or aryl-alkyl, or R.sup.1 and R.sup.2 taken together with the adjacent nitrogen atom represent a saturated 5-, 6-, 7-, or 8-membered heterocyclic ring, which may contain an additional heteroatom selected from --O--, --S--, and --N(H, Alkyl)--, and optionally bear one or more alkyl or alkenyl substituents, andZ.sup.1 designates an --OR or --NR.sup.1 R.sup.2 group, wherein R, R.sup.1, and R.sup.2 are as defined before, or a group --NHCOCH.sub.3, which comprises the base-catalysed reaction of diacetyloxamide with an alcohol ROH or/and an amine HNR.sup.1 R.sup.2. The compounds of formula (I) have many industrial utilities, mainly as intermediates and stabilizers in the polymer field.

    Process for the preparation of dicumyl peroxide
    5.
    发明授权
    Process for the preparation of dicumyl peroxide 失效
    过氧化二异丙苯的制备方法

    公开(公告)号：US4374279A

    公开(公告)日：1983-02-15

    申请号：US325338

    申请日：1981-11-27

    申请人： Giuseppe Messina ,  Mario D. Moretti ,  Loreno Lorenzoni

    发明人： Giuseppe Messina ,  Mario D. Moretti ,  Loreno Lorenzoni

    IPC分类号： C07C409/16 ,  C07C179/06

    CPC分类号： C07C409/16 ,  C07C407/00 ,  C07C407/003

    摘要： A process for the preparation of dicumyl peroxide by reaction of dimethylbenzyl hydroperoxide (cumene hydroperoxide) with methyl cumyl ether is described. The reaction is carried out in the presence of a catalytic quantity of Lewis or Bronsted acids, the methanol which forms as a by-product being removed as the reaction proceeds. Furthermore, the reaction is carried out in a reaction medium consisting of the methyl cumyl ether itself, which is employed in quantities greater than the stoichiometric quantity required for the reaction with the cumene hydroperoxide.

    摘要翻译： 描述了通过二甲基苄基氢过氧化物（氢过氧化枯烯）与甲基枯基醚反应制备过氧化二异丙苯的方法。 该反应在催化量的路易斯酸或布朗斯台德酸存在下进行，当反应进行时，作为副产物形成的甲醇被除去。 此外，反应在由甲基枯烯醚本身组成的反应介质中进行，其用量大于与氢过氧化枯烯反应所需的化学计量量。

    Synthesis of 2,2'-bis-.DELTA..sup.2 -oxazoline
    7.
    发明授权
    Synthesis of 2,2'-bis-.DELTA..sup.2 -oxazoline 失效
    2,2'-双 - DELTA 2-恶唑啉的合成

    公开(公告)号：US5026866A

    公开(公告)日：1991-06-25

    申请号：US454407

    申请日：1989-12-21

    申请人： Giuseppe Messina ,  Loreno Lorenzoni ,  Giovanna Chessa

    发明人： Giuseppe Messina ,  Loreno Lorenzoni ,  Giovanna Chessa

    IPC分类号： C07D263/08 ,  C07C257/06 ,  C07D263/16

    CPC分类号： C07D263/16

    摘要： The present invention relates to a new method of synthesis of 2,2'-bis.DELTA..sup.2 -oxazoline, which consists of three steps:in the first step,N,N'-bis-(2-hydroxyethyl)-oxamide (I) is reacted with hydrogen chloride and a nitrile of formula RCN in which R.dbd.H, alkyl, aryl, arylalkyl, alkylaryl, in order to yield the correspondingN,N'-bis-(2-iminoacyloxyethyl)oxamide.2HCl (II).In the second step, the compound (II) is pyrolyzed in order to yieldN,N'-bis-(2-chloroethyl)oxamide (III) which in the third step generates, by means of the treatment with a base, the desired product 2,2'-bis-.DELTA..sup.2 -oxazoline.

    Chemical process for the preparation of oxamide derivatives and compounds prepared thereby
    9.
    发明授权
    Chemical process for the preparation of oxamide derivatives and compounds prepared thereby 失效
    用于制备草酰胺衍生物的化学方法及其制备的化合物

    公开(公告)号：US4978786A

    公开(公告)日：1990-12-18

    申请号：US507084

    申请日：1990-04-05

    申请人： Giuseppe Messina ,  Giovanni Sechi ,  Loreno Lorenzoni ,  Vittorio Bruzzi

    发明人： Giuseppe Messina ,  Giovanni Sechi ,  Loreno Lorenzoni ,  Vittorio Bruzzi

    IPC分类号： C05C11/00 ,  C07C67/00 ,  C07C231/00 ,  C07C231/08 ,  C07C233/00 ,  C07C233/04 ,  C07C233/05 ,  C07C233/16 ,  C07C233/18 ,  C07C233/36 ,  C07C233/56

    CPC分类号： C07C233/00 ,  C07C233/16

    摘要： A process is described for the preparation of oxamide derivatives wherein one or both --NH.sub.2 groups are replaced by primary or secondary amino groups, through reaction of oxamide with a suitably selected amine of formula RR.sup.1 NH wherein R represents a substituted straight or branched (C.sub.2 -C.sub.12)alkyl radical wherein the substituent(s) or at least one of the substituents is selected from the group consisting of hydroxy, amino, mono-substituted amino, and di-substituted amino, and R.sup.1 represents hydrogen or an optionally substituted (C.sub.1 -C.sub.6)alkyl radical; representative oxamide derivatives which can thus be obtained useful as corrosion inhibitors, intermediates for polymers, polymer stabilizers, and slow-release fertilizers, are also described.

    摘要翻译： 描述了制备其中一个或两个-NH 2基团被伯或仲氨基取代的酰胺衍生物的方法，通过草酰胺与适当选择的式RR1NH的胺反应，其中R表示取代的直链或支链（C2-C12 ）烷基，其中取代基或至少一个取代基选自羟基，氨基，单取代的氨基和二取代的氨基，并且R 1表示氢或任选取代的（C 1 -C 6）烷基 ）烷基; 还描述了可以用作腐蚀抑制剂的代表性的草酰胺衍生物，聚合物的中间体，聚合物稳定剂和缓释肥料。