Abstract:
PURPOSE: To obtain the titled compound useful as a monomer for high polymer, etc. safely and economically, by subjecting 3,3'-diaminobenzophenone or 3,4'- diaminobenzophenone to catalytic reduction in an aqueous solution of mineral acid under relatively mild conditions. CONSTITUTION: 3,3-Diaminobenzophenone or 3,4'-diaminobenzophenone is subjected to catalytic reduction in an aqueous solution of mineral acid (preferably sulfuric acid, or hydrochloric acid) preferably in the presence of a palladium or platinum catalyst industrially at 20W150°C at normal pressure W100kg/cm 2 to give the desired compound. An amount of the mineral acid used is 0.1W4 equivalent, preferably 1W2.5 equivalent based on diaminobenzophenone of raw material. The concentration of the aqueous solution of the mineral acid is 0.05W12 normality, preferably 0.5W4 normality. An amount of the catalyst used is properly 0.01W20wt% calculated as metal based on the raw material. COPYRIGHT: (C)1984,JPO&Japio
Abstract:
PURPOSE: To obtain the titled compound useful as an intermediate for agricultural chemicals, medicines and raw material for heat-resistant resins, etc., by nitrating 4,4'-dichlorobenzophenone, etc. in an aliphatic halogenated hydrocarbon as a solvent. CONSTITUTION: 4,4'-Dichlorobenzophenone or 4,4'-dichlorodiphenyl sulfone is nitrated with a mixed acid or a nitrate and sulfuric acid in an aliphatic halogenated hydrocarbon solvent in an amount of 1W10 times or the weight of the raw material at 20W100°C, preferably 40W80°C, to give the aimed crystalline compound. Preferably, the nitric acid having 1.45W1.50 specific gravity in a molar amount of 2.2W3.0 times of that of the raw material or the nitrate in a molar amount of 2.1W2.5 times of that of the raw material is used. EFFECT: The heat of reaction is easily controlled, and the amount of the mixed acid can be reduced. The reaction mixture is easily post-treated. COPYRIGHT: (C)1983,JPO&Japio
Abstract:
PURPOSE: To obtain the titled compound industrially advantageously, by using 3- or 4-nitrobenzoyl chloride and chlorobenzene as starting substances, subjecting them to three-stage processes of Friedel-Crafts reaction, nitration reaction and reduction, and dehydrochlorination. CONSTITUTION: 3- or 4-Nitrobenzoyl chloride and chlorobenzene are subjected to Friedel-Crafts reaction in the presence of a Lewis acid catalyst to give a mixture of isomers of chloronitrobenzophenone. This compound without purification is nitrated to give a mixture of chloro-dinitrobenzophenone. This compound is reduced catalytically and dechlorinated in the presence of a reductive catalyst and a dehydrochlorinating agent, to give 3,3'- or 3,4'-diaminobenzophenone useful as a monomer for heat-resistant high polymers, intermediate for agricultural chemicals, drugs, etc. in high yield in high purity and industrially inexpensively. COPYRIGHT: (C)1984,JPO&Japio
Abstract:
PURPOSE:To obtain the titled compound useful as agricultural chemicals, etc. industrially advantageously, by nitrating a reaction mixture of 4-chlorobenzenesulfonic acid, etc. and chlorobenzene to give an isomer mixture, reducing it catalytically without separating and purifying it, followed by dehydrochlorinating the reaction product. CONSTITUTION:A reaction mixture obtained by reacting 4-chloro-benzenesulfonic acid or 4-chlorobenzenesulfonyl chloride and benzene is nitrated using mixed acid, fuming nitric acid, etc. as a nitrating agent, to give a mixture of dinitrodichlorodiphenylsulfone. It is then reduced catalytically, and dehydrochlorinated in the presence of a reducing catalyst (e.g., Ni, Pd, etc.) and a dehydrochlorinating agent (e.g., CaCO3, NaOH, MgO, etc.), to give 3, 3'-diaminodiphenyl- sulfone. An isomer mixture obtained by the nitration does not need separation and purification and the desired substance is obtained in high yield.
Abstract:
PURPOSE: To obtain 3,3'-diaminodiphenylmethane useful as an intermediate for agricultural chemicals, drugs, etc., in high yield industrially advantageously, by reducing catalytically and dechlorinating a specific dinitrobenzophenone in the presence of a reducing catalyst. CONSTITUTION: A benzophenone compound shown by the formula I (X 1 and X 2 are H, or Cl; with the proviso that a case where both are Cl is omitted) is nitrated, to give a dinitrobenzophenone shown by the formula II. The prepared dinitorbenzophenone shown by the formula II is reduced catalytically and dechlorinated in the presence of a reducing catalyst(e.g., Ni, Pt, Co, etc.) in an organic solvent such as methanol, etc., to give 3,3'-diaminophenylmethane. The reaction is carried out preferably at 20W200°C reaction temperature at normal pressure W50kg/cm 2 . EFFECT: Neigher problem of environmental pollution resulting from waste is caused, nor complicated purifying process is required. COPYRIGHT: (C)1984,JPO&Japio
Abstract translation:目的:在还原催化剂存在下,通过在特定的二硝基二苯甲酮中进行催化脱氯和脱氯,得到3,3'-二氨基二苯基甲烷作为农药,药物等中间产物的高产率。 构成:将式I所示的二苯甲酮化合物(X1和X2为H或Cl,条件是省略了两者均为Cl的情况)硝化,得到式II所示的二硝基二苯甲酮。 在有机溶剂如甲醇等中,在还原催化剂(例如Ni,Pt,Co等)存在下,将式II所示的制备的二硝基二苯甲酮催化还原脱氯,得到3,3'- 二氨基苯基甲烷。 反应优选在20-200℃的反应温度在常压-50kg / cm 2下进行。 影响:造成污染环境污染的问题较严重,不需要复杂的净化过程。
Abstract:
PURPOSE: To obtain the titled compound industrially advantageously, by nitrating a reaction mixture of 2-chlorobenzoyl chloride, etc. and chlorobenzene, reducing catalytically it in the presence of a reducing catalyst and a dehydrochlorinating agent, dechlorinating it. CONSTITUTION: A reaction mixture obtained by Friedel-Crafts reaction of 2- chlorobenzoyl chloride and/or 4-chlorobenzoyl chloride and chlorobenzene is nitrated to give a mixture of dinitrodichloro-benzophenone, which is subjected to catalytic reduction in the presence of a reducing catalyst (e.g., Ni, or Pd) and a dehydrochlorinating agent (e.g., NaOH), and dechlorinated, to give 3,3'-diaminobenzophenone. The nitration is carried out using a common nitrating agent (e.g., mixed acid, fuming nitric acid) at 50W100°C for 2W10hr, the intermediate is not isolated, and the reduction of nitro group and the dechlorination are carried out successively or simultaneously. COPYRIGHT: (C)1984,JPO&Japio
Abstract:
PURPOSE: To prepare the titled compound useful as a monomer of a heat-resistant polymer, etc., economically, in high yield, by the catalytic reduction and dehalogenation of a benzophenone compound in the presence of a reduction catalyst and a dehydrohalogenating agent. CONSTITUTION: A benzophenone compound of formula (X and Y are halogen atom) is subjected to the catalytic reduction and dehalogenation in the presence of a reduction catalyst (e.g. Ni, Pd, etc.) and a dehydrohalogenating agent (e.g. CaCO 3 , NaOH, etc.) to obtain the objective 3,3'-diaminobenzophenone. The reaction is carried out usually in a reaction solvent (e.g. methanol) at 20W 200°C, especially 20W100°C under atmospheric pressure W about 50kg/cm 2 .G. There is no environmental pollution with wastes, and a high-purity product can be obtained without using purification process. COPYRIGHT: (C)1983,JPO&Japio
Abstract:
PURPOSE:To obtain a recording sheet with a gradation property which is better in the rising of the color development density at the moment of heating by using one or more kinds of specified 2, 2'-methylene diphenyl compounds as developer for a thermal recording sheet. CONSTITUTION:2,2'-methylenediphenol compound as given by the formula (where, R represents hydrogen, alkyl group with C1-C12, cycloalkyl group with C3- C10, alalkyl group or phenyl group with C7-C10, which may be identical or different) and a coloring agent developing color by a melt reaction with the developer are separately dissolved or dispersed in water or a solvent and mixed together. An appropriate binder is added to the mixture and the mixed liquid thus obtained is applied on a supporting body such as paper and synthetic resin film and dried. The quantities of the components shall be 1-15pt.wt. for the coloring agent, 1-95pt.wt. for the developer of the formula and 1-40pt.wt. for the binder.