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18 条记录 (耗时 0.016 秒)

    Method of preparation of oxalic acid esters and amides
    3.
    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.

    Synthesis of 2,2'-bis-.DELTA..sup.2 -oxazoline
    8.
    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.

    Process for the preparation of dicumyl peroxide
    9.
    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。