NITRATE ESTER PREPARATION
    133.
    发明公开
    NITRATE ESTER PREPARATION 失效
    用于生产硝酸酯。

    公开(公告)号:EP0471043A1

    公开(公告)日:1992-02-19

    申请号:EP91902460.0

    申请日:1991-01-10

    CPC classification number: C07C201/02 C07C203/04 C07C203/08 C07C203/10

    Abstract: Procédé permettant d'obtenir un rendement élevé d'esters de nitrate solubles dans l'eau ou dans l'acide sans recours à des solvants organiques dans la réaction de nitratation et sans produire des produits ou des produits secondaires instables. Le procédé consiste à nitrater un composé organique à teneur en hydroxy à l'aide d'un agent de nitratation approprié tel que l'acide nitrique en l'absence de solvants organiques dans la réaction de nitratation. On neutralise le mélange réactionnel, ce qui provoque la précipitation ou la séparation des esters de nitrate de la solution de nitrate neutralisée. Ensuite, on récupère l'ester de nitrate et l'on peut en enlever tous les éventuels sels de nitrate dissous par un lavage délicat avec de l'eau ou avec une solution diluée d'halogénure. Selon le procédé, on n'utilise aucun solvant organique dans la réaction de nitratation, et les rendements moyens sont compris entre environ 80 % et environ 95 %.

    A process for the manufacture of nitric acid esters
    135.
    发明公开
    A process for the manufacture of nitric acid esters 失效
    一种制备硝酸酯的方法

    公开(公告)号:EP0129995A3

    公开(公告)日:1985-06-12

    申请号:EP84303752

    申请日:1984-06-04

    Applicant: AECI LIMITED

    CPC classification number: C07C201/02 C07C203/04

    Abstract: The invention concerns a process for the preparation of nitric acid esters of organic hydroxy compounds by reacting an organic hydroxy compound with nitric acid in the presence of sulphuric acid and in a solvent, followed by separating off the spent acid, substantially neutralizing the residual acidity of the organic solution, and removing solvent to leave the organic nitrate. From 95% to 220% of the stoichiometric requirement of nitric acid for complete nitration is used. The mole ratio of water to sulphuric acid at the end ofthe reaction is from 0,2:1 to 2,5:1. From 200 to 2000 ml of solvent per mole of hydroxy group is present. Yields of at least 92% are obtained. The invention is particularly suitable for the preparation of alkyl nitrates, alkylene or polyalkylene glycol, monoalkyl ether mononitrates, alkylene or polyalkylene glycol dinitrates, diol nitrates, nitrates containing homocyclic or heterocyclic rings, or nitrates derived from polyols.

    A process for the manufacture of nitric acid esters
    136.
    发明公开
    A process for the manufacture of nitric acid esters 失效
    Verfahren zur Herstellung vonSalpetersäureestern。

    公开(公告)号:EP0129995A2

    公开(公告)日:1985-01-02

    申请号:EP84303752.4

    申请日:1984-06-04

    Applicant: AECI LIMITED

    CPC classification number: C07C201/02 C07C203/04

    Abstract: The invention concerns a process for the preparation of nitric acid esters of organic hydroxy compounds by reacting an organic hydroxy compound with nitric acid in the presence of sulphuric acid and in a solvent, followed by separating off the spent acid, substantially neutralizing the residual acidity of the organic solution, and removing solvent to leave the organic nitrate. From 95% to 220% of the stoichiometric requirement of nitric acid for complete nitration is used. The mole ratio of water to sulphuric acid at the end ofthe reaction is from 0,2:1 to 2,5:1. From 200 to 2000 ml of solvent per mole of hydroxy group is present. Yields of at least 92% are obtained. The invention is particularly suitable for the preparation of alkyl nitrates, alkylene or polyalkylene glycol, monoalkyl ether mononitrates, alkylene or polyalkylene glycol dinitrates, diol nitrates, nitrates containing homocyclic or heterocyclic rings, or nitrates derived from polyols.

    Abstract translation: 本发明涉及一种通过有机羟基化合物与硝酸在硫酸存在下和溶剂中反应制备有机羟基化合物的硝酸酯的方法,然后将废酸分离出来,基本上中和残余酸度 有机溶液,并除去溶剂留下有机硝酸盐。 使用硝酸完全硝化的化学计量要求的95%至220%。 反应结束时水与硫酸的摩尔比为0.2:1〜2.5:1。 存在每摩尔羟基200至2000ml溶剂。 产率至少为92%。 本发明特别适用于制备烷基硝酸盐,亚烷基或聚亚烷基二醇,单烷基醚单硝酸盐,亚烷基二醇二烷基二醇二醇,二醇硝酸盐,含有环状或杂环的硝酸盐,或由多元醇衍生的硝酸盐。

    Naproxen nitroxyalkyl ester
    140.
    发明专利
    Naproxen nitroxyalkyl ester 审中-公开
    NAPROXEN NITROXYALKYL ESTER

    公开(公告)号:JP2011042690A

    公开(公告)日:2011-03-03

    申请号:JP2010266860

    申请日:2010-11-30

    CPC classification number: C07C201/02 C07C203/04

    Abstract: PROBLEM TO BE SOLVED: To obtain a naproxen nitroxyalkyl ester having an enantiomeric excess of at least 97%, preferably 98% or higher.
    SOLUTION: A halide of 2-(S)-(6-methoxy-2-naphthyl)-propionic acid of formula A-Hal (wherein A is an acyl residue of an acid) is reacted with an aliphatic nitroxyalkanol HO-Y-ONO
    2 (wherein Y is a 1C-20C alkylene group or a 3C-8C cycloalkylene group or an alkylene group as defined and including a cycloalkylene group as defined) in an inactive organic solvent under the presence of an inorganic base. Thus is produced a nitroxyalkyl ester of 2-(S)-(6-methoxy-2-naphthyl)-propionic acid having an enantiomeric excess of at least 97%, preferably 98% or higher.
    COPYRIGHT: (C)2011,JPO&INPIT

    Abstract translation: 待解决的问题:获得具有至少97%,优选98%或更高的对映异构体过量的萘普生硝基烷基酯。 解决方案:将式A-Hal(其中A是酸的酰基残基)的2-(S) - (6-甲氧基-2-萘基) - 丙酸的卤化物与脂族硝基链烷醇HO- Y-ONO 2 (其中Y是一个1C-20C亚烷基或3C-8C亚环烷基或所定义的亚烷基,包括如所定义的亚环烷基)在惰性有机溶剂中, 的无机碱。 由此产生具有至少97%,优选98%或更高的对映异构体过量的2-(S) - (6-甲氧基-2-萘基) - 丙酸的硝基烷基酯。 版权所有(C)2011,JPO&INPIT

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