摘要:
A process for the production of a halogen-substituted benzenedimethanol represented by the formula (2): wherein X2, X2, X3 and X4 are the same or different and independently represent a hydrogen atom or a halogen atom, provided that at least one of X1, X2, X3 and X4 represents a halogen atom, comprising reacting a halogen-substituted terephthalic acid diester represented by the formula (1): wherein X1, X2, X3 and X4 are the same meanings as defined above and R1 and R2 are the same or different and independently represent an unsubstituted or substituted alkyl group, a metal borohydride compound and an acid in the presence of an ether solvent, wherein the amount of the acid is 0.2 to 3 moles per 1 mole of the metal borohydride compound based on protons, and the reaction is conducted under the condition where the liquid phase of the reaction mixture is a single layer.
摘要:
A method for producing a halogen-substituted benzenedimethanol represented by the formula (2): wherein X1 to X4 are the same or different and independently represent a halogen atom or the like, provided that at least one of X1 to X4 is a halogen atom, by reacting a halogen-substituted terephthalic acid diester represented by the formula (1): wherein R1 and R2 are the same or different and independently represent a C1-C20 alkyl group which may have a substitutent or substituents, and X1 to X4 is the same as defined above, with a borohydride compound in the presence of an alcohol which comprises adding the alcohol into a mixture of the halogen-substituted terephthalic acid diester represented by the formula (1), the borohydride compound and a solvent.
摘要:
There is provided is a process for producing a sulfur-containing α-hydroxycarboxylic acid compound represented by the formula (2): wherein R1 represents hydrogen, C1-8 alkyl, or C6-20 aryl, which comprises subjecting a sulfur-containing ketol represented by the formula (1): wherein R1 is the same as defined above, to the action of microbial cells of a microorganism belonging to the genus Pseudomonas, Rhodococcus or Bacillus capable of converting the ketol into a corresponding α-hydroxycarboxylic acid compound, or a treated material thereof, thereby producing the sulfur-containing α-hydroxycarboxylic acid without using a hydroxynitrile compound as a starting material.
摘要:
A method for producing tetrafluoroterephthalic acid difluoride comprising reacting tetrachloroterephthalic acid dichloride with potassium fluoride in the presence of dimethyl sulfone.
摘要:
A method for producing a fluorine-containing organic compound represented by the formula (7): R—Fm (7) wherein R represents a substituted or unsubstituted saturated hydrocarbon group, or a substituted or unsubstituted aromatic group and m represents an integer satisfying the inequality: 1≦m≦n, which comprises reacting a fluorinating agent represented by the formula (1): wherein R1 and R3 are the same or different, and represent an optionally substituted alkyl group, R2, R4 and R5 are the same or different, and represent a hydrogen atom or an optionally substituted alkyl group, x satisfies 0
摘要:
A method for recovering tungsten from a reaction mixture obtained by reacting an organic compound with hydrogen peroxide in the presence of a tungsten catalyst comprising blowing a gas into the reaction mixture to precipitate tungstic acid (WO3.H2O) and separating tungstic acid precipitated.
摘要翻译:一种从在钨催化剂存在下使有机化合物与过氧化氢反应得到的反应混合物中的钨回收方法,包括向反应混合物中吹入气体以沉淀出钨酸(WO 3 H 2 O)并分离出钨酸。
摘要:
A potassium fluoride dispersion essentially consisting of potassium fluoride and an aprotic organic solvent having a boiling point higher than that of methanol, which is obtainable by mixing a mixture containing potassium fluoride and 5 to 50 parts by weight of methanol per 1 part by weight of potassium fluoride with the aprotic organic solvent followed by concentrating the obtained mixture, and a process for producing a fluorine-containing organic compound comprising contacting an organic compound having at least one group capable of being substituted nucleophilically with a fluorine atom with the potassium fluoride dispersion.
摘要:
A method for producing 2-hydroxy-4-(methylthio)butyric acid which comprises the following steps (A), (B) and (C): Step (A): step of reacting 1,2-epoxy-3-butene with water to obtain 3-butene-1,2-diol, Step (B): step of reacting 3-butene-1,2-diol with methanethiol to obtain 4-(methylthio)butane-1,2-diol, Step (C): step of oxidizing 4-(methylthio)butane-1,2-diol to obtain 2-hydroxy-4-(methylthio)butyric acid.
摘要:
It is provided to a process for producing adipic acid which comprises making a wastewater containing hydroxycaproic acid and discharged from the step of oxidizing cyclohexane with molecular oxygen in a liquid phase react with hydrogen peroxide in the presence of a tungsten catalyst in the pH range of 0 to 6.
摘要:
A method for producing 4-(methylthio)butane-1,2-diol which comprises reacting 3-butene-1,2-diol with methanethiol in the presence of an azo compound such as an azonitrile compound, an azoester compound, an azoamidine compound and an azoimidazoline compound.