中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

478 records (took 0.05 seconds)

    Preparation of 2-nitro-4,6-dichloro-5-ethylphenol
    142.
    发明专利
    Preparation of 2-nitro-4,6-dichloro-5-ethylphenol 失效
    2-硝基-4,​​6-二氯-5-乙基苯酚的制备

    公开(公告)号：JPS6157536A

    公开(公告)日：1986-03-24

    申请号：JP17903284

    申请日：1984-08-28

    Applicant: Fuji Photo Film Co Ltd

    Inventor： ONO MICHIO ,  SUZUKI TOSHIO ,  ISHIDA RYOSUKE

    IPC: C07C205/26 ,  C07C67/00 ,  C07C201/00 ,  C07C201/10 ,  C07C213/00

    Abstract: PURPOSE: To obtain the titled compd. in high yield without separating intermediates, by sulfonating a 3-ethylphenol as a starting material with an excess amt. of concd. sulfuric acid, chlorinating the sulfonation product with Cl
    2 , etc., and substituting the nitro group for sulfo group with nitric acid.
    CONSTITUTION: 3-Ethylphenol or 4-chloro-5-ethylphenol expressed by formula VII(X is H or Cl) is sulfonated with anhydrous sulfuric acid complex in a halohydrocarbon solvent or with an excess amt. of concd. sulfuric acid to give a compound expressed by formula VIII, whichis then chlorinated with Cl
    2 gas or sulfuryl chloride to give a compound expressed by formula IX. Nitro group is then substituted for the sulfo group with nitric acid to give the titled compound expressed by formula I.
    EFFECT: Nitro group is introduced selectively producing less isomers.
    USE: A raw material for providing 2-amino-4,6-dichloro-5-ethylphenol hydrochloride useful as an intermediate for cyano type color formers easily in high yield.
    COPYRIGHT: (C)1986,JPO&Japio

    Abstract translation: 目的：获取标题化合物 以高产率分离中间体，通过用过量的amt磺化作为原料的3-乙基苯酚。 的concd 硫酸，用Cl2等对磺化产物进行氯化，用硝酸代替硝基作为磺基。 构成：式VII表示的3-乙基苯酚或4-氯-5-乙基苯酚（X为H或Cl）在无机硫酸配合物的卤代烃溶剂中或过量的氨基磺酸盐化。 的concd 硫酸，得到由式VIII表示的化合物，然后用Cl 2气体或磺酰氯进行氯化，得到式IX表示的化合物。 硝基用硝酸代替磺基，得到式Ⅰ表示的标题化合物。效果：选择性地引入硝基，产生较少的异构体。 用途：用于提供2-氨基-4,6-二氯-5-乙基苯酚盐酸盐的原料，其可用作氰基型成色剂的中间体，容易以高产率。

    Optically active nitric acid ester and its preparation
    143.
    发明专利
    Optically active nitric acid ester and its preparation 失效
    光学活性硝酸酯及其制备

    公开(公告)号：JPS59193852A

    公开(公告)日：1984-11-02

    申请号：JP6956883

    申请日：1983-04-19

    Applicant: Sumitomo Chem Co Ltd

    Inventor： UMEMURA TAKEAKI ,  INOUE AYUMI ,  MITSUTA MASARU

    IPC: C07C203/08 ,  C07C67/00 ,  C07C201/00 ,  C07C201/10

    Abstract: NEW MATERIAL:A nitric acid ester of formula I (R
    1 is H, lower alkyl; R
    2 is lower alkyl, lower alkenyl, lower alkinyl).
    EXAMPLE: (R)-3-Methyl-4-nitroxy-2-(2-propinyl)-2-cyclopentene-1-one.
    USE: It is useful as an intermediate of agricultural chemicals.
    PREPARATION: The nitration of a cyclopentenolone of formula II gives the compound of formula I . As a nitration reagent, is used nitric acid, a mixture of nitric acid and acetic anhydride, nitronium tetrafluoroborate. The amount of the reagent used is an equimolar or excessive amount based on the cyclopentenolone. In the above nitration, a solvent such as dichloromethane or chloroform may be used. The reaction temperature is -40W+30°C, preferably -30°CW+5°C.
    COPYRIGHT: (C)1984,JPO&Japio

    Abstract translation: 新材料：式I的硝酸酯（R 1为H，低级烷基; R 2为低级烷基，低级烯基，低级炔基）。 实施例：（R）-3-甲基-4-硝酰基-2-（2-丙炔基）-2-环戊烯-1-酮。 用途：作为农药的中间体是有用的。 制备：式Ⅱ的环戊烯醇酮的硝化得到式I化合物。 作为硝化试剂，使用硝酸，硝酸和乙酸酐的混合物，硝酸四氟硼酸盐。 所使用的试剂的量基于环戊烯醇酮是等摩尔或过量的。 在上述硝化中，可以使用二氯甲烷或氯仿等溶剂。 反应温度为-40〜+ 30℃，优选为-30℃〜+ 5℃。

Patent Agency Ranking