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    • 3. 发明授权
    • Process for the manufacture of epoxy-monomers and epoxides
    • 制备环氧单体和环氧化物的方法
    • US09573917B2
    • 2017-02-21
    • US14897241
    • 2014-06-09
    • SPOLEK PRO CHEMICKOU A HUTNI VYROBU A.S.
    • Pavel KubicekBedrich NemecekPetr Sladek
    • C07D301/24C07D301/26C07D301/32
    • C07D301/26C07D301/32C08G65/22C08G2650/32
    • A process for manufacturing epoxy monomers and/or epoxides in high yields and useful quality and chemical stability by dehydrochlorination of the corresponding chlorohydrins with an alkaline agent, producing the corresponding side product dry salt in a high purity, characterized in that the process comprises the following steps: a. Reaction of the chlorohydrins with the alkaline agent to form corresponding epoxides and the corresponding precipitated chloride salt; b. Dehydration, and optionally completing the reaction, of the reaction mixture of step (a), by use of an azeotropic agent, added to step (b) or generated in situ in step (a), resulting in the producing of a dehydrated reaction mixture; c. Separating the resulting chloride salt by filtration from the dehydrated reaction mixture (b) and d. Isolating the epoxide from the filtered liquid fraction.
    • 一种以高产率制备环氧单体和/或环氧化物的方法,并且通过用碱性试剂对相应的氯代醇进行脱氯化氢来产生有用的质量和化学稳定性,产生高纯度的相应的副产物干盐,其特征在于该方法包括以下 步骤:a。 氯醇与碱性试剂的反应形成相应的环氧化物和相应的沉淀氯化物盐; b。 通过使用加入到步骤(b)中的共沸剂或在步骤(a)中原位产生的步骤(a)的反应混合物的脱水和任选地完成反应),导致产生脱水的反应混合物 ; C。 通过过滤从脱水反应混合物(b)和d分离得到的氯化物盐。 从过滤的液体馏分中分离出环氧化物。
    • 4. 发明申请
    • METHOD OF SYNTHESIS OF SUBSTITUTED HEXITOLS SUCH AS DIANHYDROGALACTITOL
    • 合成替代HEXITOLS等作为二氢吡咯烷酮的方法
    • US20150329511A1
    • 2015-11-19
    • US14550131
    • 2014-11-21
    • DEL MAR PHARMACEUTICALS
    • Dennis M. BROWNMike Tso-Ping LI
    • C07D301/24C07D303/14C07C29/62
    • C07D301/24C07C29/62C07D303/14C07D493/04
    • The present invention provides an efficient method of synthesizing and purifying dianhydrohexitols such as dianhydrogalactitol. In general, as applied to dianhydrogalactitol, the method comprises: (1) reacting dulcitol with a concentrated solution of hydrobromic acid at a temperature of about 80° C. to produce dibromogalactitol; (2) reacting the dibromogalactitol with potassium carbonate in t-butanol to produce dianhydrogalactitol; and (3) purifying the dianhydrogalactitol using a slurry of ethyl ether to produce purified dianhydrogalactitol. Another method produces dianhydrogalactitol from dulcitol; this method comprises: (1) reacting dulcitol with a reactant to convert the 1,6-hydroxy groups of dulcitol to an effective leaving group to generate an intermediate; and (2) reacting the intermediate with an inorganic weak base to produce dianhydrogalactitol through an intramolecular SN2 reaction. Other methods for the synthesis of dianhydrogalactitol from dulcitol are described.
    • 本发明提供了合成和纯化二脱水己糖醇如二脱水半乳糖醇的有效方法。 通常,应用于二氢半乳糖醇时,该方法包括:(1)在约80℃的温度下使糊精与氢溴酸的浓缩溶液反应,生产二溴乳糖醇; (2)使二溴乳糖醇与碳酸钾在叔丁醇中反应,生成二脱水半乳糖; 和(3)使用乙醚的浆液纯化二脱水半乳糖醇以产生纯化的二脱水半乳糖醇。 另一种方法由二糖醇制得二脱水半乳糖醇; 该方法包括:(1)使杜仲醇与反应物反应,以将曲奇醇的1,6-羟基转化为有效的离去基团以产生中间体; 和(2)使中间体与无机弱碱反应,通过分子内SN2反应产生二脱水半乳糖。 描述了从杜尔醇醇合成二脱水半乳糖醇的其它方法。
    • 6. 发明授权
    • Preparation of α-hydroxy and α-amino ketones
    • α-羟基和α-氨基酮的制备
    • US08252959B2
    • 2012-08-28
    • US11631448
    • 2005-06-29
    • Nicole EndReinhard H. SommerladeYvonne Richter
    • Nicole EndReinhard H. SommerladeYvonne Richter
    • C07C49/00C07C45/00C07D301/24
    • C07F7/1892C07C45/30C07C45/58C07C49/82C07C49/83C07C49/747C07C49/84
    • A process for the preparation of an 1,1-disubstituted oxirane is disclosed, wherein an organic sulphide is reacted in a polar solvent with an educt containing a leaving group attached to a primary or secondary carbon atom, and/or the sulfonium salt formed in this way is reacted with a ketone in presence of a base and a polar solvent. Oxiranes of the type obtained may be further converted into the corresponding α-hydroxyketone or α-aminoketone, either in one step by subjecting to aerobic oxidation in the presence of a transition metal catalyst, or in two steps by hydrolyzation in the presence of an aqueous acid to the corresponding dialcohol and subsequent selective oxidation. Further described are some novel epoxide intermediates. The α-hydroxyketones and α-aminoketones thus obtainable are useful inter alga as photoinitiators.
    • 公开了一种制备1,1-二取代的环氧乙烷的方法,其中有机硫化物在极性溶剂中与含有连接到伯或仲碳原子的离去基团的离子和/或在 在碱和极性溶剂的存在下,与酮反应。 所得类型的环氧乙烷可以通过在过渡金属催化剂的存在下进行好氧氧化,或者在水溶液存在下通过水解两步在一个步骤中进一步转化为相应的α-羟基酮或α-氨基酮 酸至相应的二醇并随后进行选择性氧化。 进一步描述了一些新型的环氧化物中间体。 因此获得的α-羟基酮和α-氨基酮可以作为光引发剂是有效的藻类。