摘要:
The present invention relates to novel compounds represented by chemical formula (1) or pharmaceutically acceptable salt thereof, a process for preparing the same and to a pharmaceutical composition comprising the same as an active ingredient. The compounds of chemical formula (1) and salts thereof can be used as excellent angiogenesis inhibiting agent.
摘要:
The invention concerns a catalyst obtained by depositing TS-1 zeolite on an inert honeycomb-shaped support in reactions of olefin epoxidation by the action of hydrogen peroxide in liquid phase.
摘要:
Fungicidal compositions and methods comprising acylated aminosalicylamides (AASA) described herein. Novel cyclic amines and 3-nitrosalicylamides, and their use as pesticides and in the preparation of the antifungal AASA compounds are also disclosed.
摘要:
The present invention is directed to a process for the preparation of a hydrazine derivative by reaction of the corresponding oxirane with hydrazine, that uses as only solvent toluene. The process provides excellent yields and purities and allows to proceed without purification in a one-pot scheme. Toluene additionally reduces the excess of hydrazine needed to complete the reaction, significantly reducing the waste treatment costs and even allows the hydrazine to be recycled into the reaction.
摘要:
The invention relates to a process for purification of epichlorohydrin containing 1,2-epoxy-5-hexene impurity, by (a) epoxidizing allyl chloride contaminated with 1,5-hexadiene into epichlorohydrin, (b) removing any unreacted allyl chloride, (c) adding a halogen to the crude epichlorohydrin obtained after the removal of unreacted allyl chloride and allowing the halogen to react with 1,2-epoxy-5-hexene and other olefinically unsaturated components, if any, in the crude epichlorohydrin, and (d) rectifying the product of step (c) to obtain epichlorohydrin, wherein the amount of halogen added in step (c) is at a molar ratio of at least 0.5:1 to less than 1:1 calculated on the amount of said 1,2-epoxy-5-hexene and said other olefinically unsaturated components in the crude epichlorohydrin, and allowing the halogen to react until it is fully converted.
摘要:
Process of stripping a liquid medium containing at least one oligomer of glycerol, wherein a stripping agent comprising hydrogen chloride is used at a temperature higher than 120°C.
摘要:
Disclosed is: a novel, simple and low-cost method for preparing 3-hydroxy-4-(2,4,5-trifluorophenyl)-butyric acid, particularly (3S)-3-hydroxy-4-(2,4,5-trifluorophenyl)-butyric acid, which is used as a key intermediate in the preparation of sitagliptin.
摘要:
Provided are aminoalcohol compounds for use as neutralizing agents for paints and coatings. The compounds are of the formula (I): or salt thereof, wherein R 1 , R 2 , R 3 , R 4 , R 5 , and n are as defined herein. Also provided are precursors of the aminoalcohol compounds and processes for making and using them.
摘要:
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung von 1-Hydroxymethyl-1,2-diphenyloxiranen aus 2,3-Diphenylpropenalen durch Epoxidierung und Reduktion. Dadurch, dass mit der Reduktion bereits begonnen wird, bevor das 2,3-5 Diphenylpropenal vollständig umgesetzt ist, lässt sich die Bildung störender Nebenprodukte unterdrücken. Die Hydroxymethyldiphenyloxirane stellen wertvolle Zwischenprodukte für die Herstellung von 1-Azolylmethyl-1,2-diphenyloxiranen dar, aus denen letztere durch Einführung der Azolylgruppe leicht hergestellt werden können.
摘要:
The invention relates to the triazolylmethyloxiranes of formula (I), wherein variables D and B have the meanings as defined in the description and the claims.