Preparation of
erythio-.alpha.piperid-2-yl-2,8-bis-trifluoro-methyl)-quinolin-4-yl-meth
anol
    2.
    发明授权
    Preparation of erythio-.alpha.piperid-2-yl-2,8-bis-trifluoro-methyl)-quinolin-4-yl-meth anol 失效
    制备红硫-α-哌啶-2-基-2,8-双 - 三氟 - 甲基) - 喹啉-4-基 - 甲醇

    公开(公告)号:US4327215A

    公开(公告)日:1982-04-27

    申请号:US193473

    申请日:1980-10-03

    CPC classification number: C07D215/50 C07D209/38

    Abstract: The present invention relates to a simplified process, which avoids organo-lithium intermediates, for the preparation of erythro-.alpha.-piperid-2-yl-2,8-bis-(trifluoromethyl)-quinolin-4-yl-methanol, wherein 2,8-bis-(trifluoromethyl)-quinoline-4-carboxylic acid or a salt thereof is reacted with a pyrid-2-yl-magnesium halide to give pyrid-2-yl-2,8-bis-(trifluoromethyl)-quinolin-4-yl ketone in the manner of a Grignard reaction, and this product is hydrogenated, in a conventional manner, to give erythro-.alpha.-piperid-2-yl-2,8-bis-(trifluoromethyl)-quinolin-4-yl-methanol.

    Abstract translation: 本发明涉及一种避免有机锂中间体用于制备赤式α-哌啶-2-基-2,8-双(三氟甲基) - 喹啉-4-基 - 甲醇的简化方法,其中2 ,8-双(三氟甲基) - 喹啉-4-羧酸或其盐与吡啶-2-基 - 卤化镁反应,得到吡啶-2-基-2,8-双(三氟甲基) - 喹啉 -4-基酮以格利雅反应的方式,以常规方式将该产物氢化,得到红-β-哌啶-2-基-2,8-双 - (三氟甲基) - 喹啉-4-基 - 甲醇。

    Acetals which act as photoinitiators
    3.
    发明授权
    Acetals which act as photoinitiators 失效
    充当光引发剂的缩醛

    公开(公告)号:US4007209A

    公开(公告)日:1977-02-08

    申请号:US557046

    申请日:1975-03-10

    CPC classification number: C07C49/84 C07C45/71 G03F7/031

    Abstract: The invention relates to special acetals of benzoin compounds which act as photoinitiators, and to a technically simple manufacturing process involving the reaction of an appropriate .alpha.- or .beta.-hydroxyketone with an .alpha.,.beta.-olefinically unsaturated ether in the presence of an acid catalyst. The acetals are particularly suitable for use as photoinitiators in the preparation of photopolymer printing plates.

    Abstract translation: 本发明涉及用作光引发剂的苯偶姻化合物的特殊缩醛,以及涉及在酸催化剂存在下使合适的α-或β-羟基酮与α,β-烯属不饱和醚反应的技术上简单的制备方法。 缩醛特别适用于制备光聚合物印版的光引发剂。

    Preparation of unsaturated compounds by elimination reaction
    7.
    发明授权
    Preparation of unsaturated compounds by elimination reaction 失效
    通过消除反应制备不饱和化合物

    公开(公告)号:US4973751A

    公开(公告)日:1990-11-27

    申请号:US275663

    申请日:1988-11-22

    CPC classification number: C07D307/46 C07C41/28

    Abstract: Compounds of the formula IR.sup.1 --CH.dbd.CH--R.sup.2 Iwhere R.sup.1 is hydrogen or alkyl and R.sup.2 is alkoxy or acylamino, and R.sup.1 and R.sup.2 together may form a heterocyclic ring, are prepared by elimination of the radical R.sup.3 OH from a compound of the formula II ##STR1## where R.sup.1 and R.sup.2 have the above meanings and R.sup.3 is alkyl, by a method in which the elimination is carried out by passing the compound of the formula II in a liquid or gaseous state into a high-boiling mineral oil above the boiling point of compound I being formed, compound I is taken off in gaseous form, and the high-boiling mineral oil enriched with by-products is removed and replaced with fresh mineral oil.

    Abstract translation: 式ⅠR1-CH = CH-R2I的化合物,其中R1是氢或烷基,R2是烷氧基或酰基氨基,R1和R2可以一起形成杂环,是通过从 式II其中R1和R2具有上述含义,R3是烷基,其中通过使式II化合物以液态或气态进入高沸点矿物油中进行消除的方法, 在形成化合物I的沸点之上,将化合物I以气态形式除去,并且除去富含副产物的高沸点矿物油并用新的矿物油代替。

    Preparation of
cis-2-(1H-1,2,4-triazol-1-ylmethyl)-2-(halopheny)-3-(halophenyl) oxirane
    9.
    发明授权
    Preparation of cis-2-(1H-1,2,4-triazol-1-ylmethyl)-2-(halopheny)-3-(halophenyl) oxirane 失效
    顺式-2-(1H-1,2,4-三唑-1-基甲基)-2-(卤代苯基)-3-(卤苯基)环氧乙烷的制备

    公开(公告)号:US5245042A

    公开(公告)日:1993-09-14

    申请号:US874227

    申请日:1992-04-27

    CPC classification number: C07D249/08 C07D231/12 C07D233/56

    Abstract: A process is described for the preparation of cis-2-(1H-1,2,4-triazol-1-ylmethyl)-2-(halophenyl)-3-(halophenyl)oxirane I ##STR1## by epoxidizing Z-3-(1H-1,2,4-triazol-1-yl)-2-(halophenyl)-1-halophenyl)propene II, ##STR2## where halogen is in each case fluorine, chlorine or bromine, which comprises reacting the crude product of the epoxidation with one or more reducing agents, which are added to the reaction mixture in a considerable excess over the amount necessary to destroy any peroxide compounds present.

    Abstract translation: 描述了通过环氧化Z-3-(1H-1,2,4-三唑-1-基甲基)-2-(卤代苯基)-3-(卤代苯基)环氧乙烷I (1H-1,2,4-三唑-1-基)-2-(卤代苯基)-1-卤代苯基)丙烯II,其中卤素在各种情况下为氟,氯或溴,其包括使粗产物 与一种或多种还原剂进行环氧化反应,其以相当多的过量加入反应混合物中超过破坏存在的任何过氧化物化合物所需的量。

Patent Agency Ranking