PROCESS FOR PREPARING NITROIMIDAZOLE DERIVATIVES

    公开(公告)号:KR820001686B1

    公开(公告)日:1982-09-17

    申请号:KR760002570

    申请日:1976-10-15

    Applicant: BASF AG

    Abstract: Nitroimdazolyivinylthiadiazoles (I, R1 = C1-4 alkyl; R2 = H, CH3; R3 = H, C1-24 alkyl, substitutable ph, heteroallyl) useful agents for treating bacteria, fungi and protozoa, were prepd. by the reaction of 2-substituted-1,3,4-thiadiazole(II) and 5-nitroimidazole-2-carboxaldehyde(III) or its acetal at elevated temp. Thus, 2,5-dimethy 1-1,3,4-thiadiazole and 1-methyl-5-nitroimidazole-2-carboxy aldehyde were refluxed in glacial acetic acid and acetic anhydride in the presence of ZnCl2 for 10 hr and recrystallized with DMF to give -methyl-5-[2-(1-methyl-5-nitroimidazol-2-yl)-vinyl -1,3,4-thiadiazloe(m.p. 248≦̸C).

    Production of lactones having from six to thirteen ring members and isobutyric acid
    2.
    发明授权
    Production of lactones having from six to thirteen ring members and isobutyric acid 失效
    生产从六至十三环会员和异丁酸的乳液

    公开(公告)号:US3564018A

    公开(公告)日:1971-02-16

    申请号:US3564018D

    申请日:1969-01-14

    Applicant: BASF AG

    CPC classification number: C07C51/235 C07C53/124

    Abstract: AN IMPROVED PROCESS FOR THE PRODUCTION OF LACTONES HAVING SIX TO THIRTEEN RING MEMBERS AND ISOBUTYRIC ACID BY REACTION OF A CYCLIC KETONE HAVING FROM FIVE TO TWELVE RING MEMBERS AND ISOBUTYRIC ACID BY REACTION OF A CYCLIC KETONE HAVING FROM FIVE TO TWELVE RING MEMBERS AND ISOBUTYRALDEHYDE WITH MOLECULAR OXYGEN OR A GAS CONTAINING THE SAME, THE IMPROVEMENT CONSISTING IN CARRYING OUT THE REACTION WITHOUT USING A CATALYST. LACTONES ARE USED IN THE PRODUCTION OF POLYESTOR.

    PRODUCTION OF ALPHA,BETA-UNSATURATED CARBOXYLIC OMEGA-HYDROXY-ESTER

    公开(公告)号:JPH10182555A

    公开(公告)日:1998-07-07

    申请号:JP34006197

    申请日:1997-12-10

    Applicant: BASF AG

    Abstract: PROBLEM TO BE SOLVED: To obtain the subject compound of high purity in high yield with suppression of the formation of by-products by treating a vinyloxy-ester of a carboxylic acid in the presence of an alcohol. SOLUTION: An α,β-unsaturated carboxylic ester of formula I (R is H, a 1-4C alkyl; R is H, methyl) is subjected to the transesterification, with a vinyloxy group-bearing alcohol of the formula: CH2 =CH-O-A-OH (A is a 2-12C alkylene) in the presence of a base catalyst to prepare a vinyloxy carboxylic ester of formula II. In addition, the compound of formula II is allowed to react with an alcohol, preferably 1,2-diol or 1,3-diol to prepare an α,β-unsaturated carboxylic ω-hydroxyester thereby giving a compound of formula III not accompanied by formation of by-products such as cyclic ethers or diesters through an environmentally acceptable and usually applicable process.

    Manufacture of carboxamides
    6.
    发明授权
    Manufacture of carboxamides 失效
    甲酰胺的制造

    公开(公告)号:US3928439A

    公开(公告)日:1975-12-23

    申请号:US45945874

    申请日:1974-04-10

    Applicant: BASF AG

    CPC classification number: B01J23/12 B01J23/84

    Abstract: Manufacture of carboxamides by the addition of water to nitriles in the presence of a copper-containing and magnesium silicatecontaining catalyst which has been treated with a reducing gas. The carboxamides obtained by the process of the invention are valuable starting materials for the manufacture of solvents, flocculating agents, crosslinking agents, pesticides, plant protectants, textile auxiliaries such as levelling agents, waterproofing agents, foam stabilizers and detergents.

    Abstract translation: 在含还原气体处理过的含铜硅酸镁催化剂存在下,通过向腈中加入水来制造甲酰胺。 通过本发明方法获得的羧酰胺是用于制造溶剂,絮凝剂,交联剂,农药,植物保护剂,纺织助剂如流平剂,防水剂,泡沫稳定剂和洗涤剂的有价值的原料。

    Production of lactic acid
    7.
    发明授权
    Production of lactic acid 失效
    生产酸性酸

    公开(公告)号:US3642889A

    公开(公告)日:1972-02-15

    申请号:US3642889D

    申请日:1966-11-01

    Applicant: BASF AG

    CPC classification number: C07C51/097 C07C59/08

    Abstract: PROCESS FOR PRODUCING LACTIC ACID BY THE HYDROLYSIS OF LACTIC ACID NITRATE IN WHICH THE LACTICE ACID NITRATE IS REACTED WITH MORE THAN TWICE ITS WEIGHT OF WATER. IT HAS BEEN FOUND THAT HIGH YEILDS OF LACTICE ACID CAN BE OBTAINED EITHER FROM PURE LATICE ACID NITRATE OR FROM THE REACTION PRODUCT CONTAINING IMPURITIES AS WELL AS LACTIC ACID NITRATE.

    PROCEDIMIENTO PARA SEPARAR IONES METALICO ALCALINOS DE ALCOXILADOS.

    公开(公告)号:ES2280374T3

    公开(公告)日:2007-09-16

    申请号:ES01936367

    申请日:2001-05-16

    Applicant: BASF AG

    Abstract: Procedimiento para separar iones metálico alcalinos de alcoxilados que contienen iones metálico alcalinos, que comprende: a) dilución del alcoxilado que contiene metal alcalino con un solvente inerte, b) tratamiento de la solución de alcoxilado que contiene metal alcalino con cambiador de cationes, para obtener una solución que contenga menos de 5 ppm de iones metálico alcalino, c) eliminación del solvente de la solución esencialmente libre de metal alcalino, para obtener un alcoxilado que contenga menos de 5 ppm de iones metálico alcalinos y menos de 1 000 ppm de solvente, siendo el procedimiento uno que comprende una regeneración del cambiador de cationes que consta de las siguientes etapas: d1) eliminación de la solución de alcoxilado a partir del cambiador de cationes y elución del cambiador de cationes con un solvente inerte, d2) elución, si es necesario, del cambiador de cationes con agua desmineralizada, d3) regeneración de la resina cambiadora de cationes con un ácido, d4) relavadode la resina cambiadora de cationes con agua desmineralizada, d5) elución del agua que se encuentra en la resina cambiadora de iones con un solvente inerte, y d6) si es necesario, cargar el cambiador de cationes con el solvente inerte deseado para el tratamiento con el cambiador de cationes, eliminando en la etapa d1) la solución de alcoxilado del cambiador de cationes, presionándolo con un gas inerte.

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