Process for producing 5-halomethylfurfural
    1.
    发明授权
    Process for producing 5-halomethylfurfural 失效
    5-卤代甲基糠醛的制备方法

    公开(公告)号:US4424390A

    公开(公告)日:1984-01-03

    申请号:US437254

    申请日:1982-10-28

    CPC分类号: C07D307/46

    摘要: A process for producing 5-halomethylfurfural represented by the formula, ##STR1## wherein X is Cl or Br, which comprises carrying out a acid-decomposition of saccharide in a water/organic solvent/magnesium halide system with hydrochloric acid, sulfuric acid, hydrogen chloride or other mineral acid in the presence or absence of surface active agent as a catalyst. The 5-halomethylfurfural is useful as an intermediate of medicines, agricultural chemicals, perfumes and the like.

    摘要翻译: 一种由下式表示的5-卤代甲基糠醛的方法,其中X是Cl或Br,其中包括用盐酸,硫酸,氢气在水/有机溶剂/卤化镁体系中进行糖分解 氯化物或其他无机酸在表面活性剂的存在或不存在下作为催化剂。 5-卤代甲基糠醛可用作药物,农药,香料等的中间体。

    Process for the preparation of hydroxybenzaldehydes
    2.
    发明授权
    Process for the preparation of hydroxybenzaldehydes 失效
    制备羟基苯甲醛的方法

    公开(公告)号:US4584410A

    公开(公告)日:1986-04-22

    申请号:US670847

    申请日:1984-11-13

    CPC分类号: C07C45/008

    摘要: In a Reimer-Tiemann reaction for the preparation of a mixture of two hydroxybenzaldehydes (i.e., salicylaldehyde and p-hydroxybenzaldehyde) by reacting phenol with chloroform and an aqueous alkali solution in a heterogeneous system, the two hydroxybenzaldehydes can be prepared in a controlled formation ratio, yield and reaction rate depending upon the conditions used when the reaction is carried out in the presence of a phase transfer catalyst selected from the group consisting of a cationic type phase transfer catalyst, an amphoteric type phase transfer catalyst and an anionic type phase transfer catalyst.

    摘要翻译: 在通过使苯酚与氯仿和非均相体系中的碱性水溶液反应制备两种羟基苯甲醛(即水杨醛和对羟基苯甲醛)的混合物的Reimer-Tiemann反应中,两种羟基苯甲醛可以以受控的形成比 ,产率和反应速率取决于反应在相转移催化剂存在下使用的条件,所述相转移催化剂选自阳离子型相转移催化剂,两性相转移催化剂和阴离子型相转移催化剂 。

    Method for producing an optically active
2,2-dimethylcyclopropanecarboxylic acid
    3.
    发明授权
    Method for producing an optically active 2,2-dimethylcyclopropanecarboxylic acid 失效
    光学活性2,2-二甲基环丙烷羧酸的制造方法

    公开(公告)号:US4542235A

    公开(公告)日:1985-09-17

    申请号:US482259

    申请日:1983-04-05

    IPC分类号: C07C51/487 C07C61/04

    CPC分类号: C07C51/487

    摘要: A method for producing an optically active 2,2-dimethylcyclopropanecarboxylic acid useful as an intermediate for dehydropeptidase I inhibitors, medicines and agricultural chemicals, which comprises reacting an optically active diphenylethylamine represented by the formula, ##STR1## wherein R.sub.1 and R.sub.2 are each a hydrogen atom or a lower alkyl group, with 2,2-dimethylcyclopropanecarboxylic acid in a solvent to achieve the optical purification of said acid.

    摘要翻译: 一种用作脱水肽酶I抑制剂,药物和农药的中间体的光学活性2,2-二甲基环丙烷羧酸的制备方法,其包括使下式表示的光学活性二苯乙胺,其中R1和R2各自为氢 原子或低级烷基,与2,2-二甲基环丙烷羧酸在溶剂中实现所述酸的光学纯化。

    Process for preparation of hydroxybenzaldehydes
    5.
    发明授权
    Process for preparation of hydroxybenzaldehydes 失效
    羟基苯甲醛的制备方法

    公开(公告)号:US4469894A

    公开(公告)日:1984-09-04

    申请号:US388817

    申请日:1982-06-16

    CPC分类号: C07C45/008

    摘要: In a Reimer-Tiemann reaction for the preparation of a mixture of salicylaldehyde and p-hydroxybenzaldehyde, improved yield of the product and high selectivity of salicylaldehyde can be obtained when an alkali metal salt of a phenol is reacted with a reaction mixture comprised of chloroform and a slurry of an alkali metal hydroxide (preferably, in a fine powder state thereof) and an inert organic solvent and optionally, a catalytic amount of a surfactant.

    摘要翻译: 在用于制备水杨醛和对羟基苯甲醛的混合物的Reimer-Tiemann反应中,当苯酚的碱金属盐与由氯仿和氯仿组成的反应混合物反应时,可以获得产物的高产率和水杨醛的高选择性 碱金属氢氧化物(优选细粉末状态)和惰性有机溶剂和任选的催化量的表面活性剂的浆料。

    Asymmetric copper complex and cyclopropanation reaction using the same
    10.
    发明授权
    Asymmetric copper complex and cyclopropanation reaction using the same 失效
    不对称铜络合物和环丙烷化反应使用相同

    公开(公告)号:US06858559B2

    公开(公告)日:2005-02-22

    申请号:US10128237

    申请日:2002-04-24

    摘要: Disclosed is an asymmetric copper catalyst composition comprising, as components, (a) an optically active bisoxazoline compound of formula (1): wherein R1 and R2 are different and each represents a hydrogen atom, an alkyl group, a cycloalkyl group, or a phenyl or aralkyl group which may be substituted, R3 and R4 each represents a hydrogen atom, an alkyl group, a cycloalkyl group, or a phenyl or aralkyl group which may be substituted, or R3 and R4 may be bonded to each other to form a C3-5 cyclic alkylene group, R5 represents a hydrogen atom or a C1-6 alkyl group, or the two R5 groups may be bonded to each other to represent a C3-5 cyclic alkylene group, (b) a monovalent or divalent copper compound, and (c) a strong acid or a Lewis acid or a mixture thereof, and a process for producing an optically active cyclopropanecarboxylate using the same.

    摘要翻译: 公开了一种不对称铜催化剂组合物,其包含作为组分的(a)式(1)的光学活性双恶唑啉化合物:其中R 1和R 2不同,并且各自表示氢原子,烷基,环烷基 基团或可被取代的苯基或芳烷基,R 3和R 4各自表示氢原子,烷基,环烷基或可被取代的苯基或芳烷基, 3>和R 4可以彼此键合以形成C 3-5环状亚烷基,R 5表示氢原子或C 1-6烷基,或者两个R 5基团可以键合 彼此表示C3-5环状亚烷基,(b)单价或二价铜化合物,和(c)强酸或路易斯酸或其混合物,以及使用该方法制备光学活性环丙烷羧酸酯的方法 相同。