Heterocyclylmethyl-substituted pyrazole derivatives and their use for
申请人:Bayer Aktiengesellschaft
公开号:US06166027A1
公开(公告)日:2000-12-26
The present invention relates to new heterocyclylmethyl-substituted pyrazole derivatives, processes for their preparation and their use as medicaments, in particular as medicaments for treatment of cardiovascular diseases.
Palladium-catalyzed addition reaction of olefins, carbon tetrachloride and carbon monoxide in alcohols to give 2-alkyl-4,4,4-trichlorobutanoates
作者:Jiro Tsuji、Koji Sato、Hideo Nagashima
DOI:10.1016/s0040-4020(01)96745-6
日期:1985.1
Pd(OAc)2 combined with PPh3 is a good catalyst for the addition reaction of CCl4 and CO to olefins in ethanol to afford ethyl 2-alkyl-4,4,4-trichlorobutanoates. The esters were obtained in satisfactory yields when the reaction was carried out at 50° in the presence of K2CO3 under CO pressure.
Pd(OAc)2与PPh 3结合是将CCl 4和CO加成乙醇中的烯烃,得到2-烷基-4,4,4-三氯丁酸乙酯的良好催化剂。当反应在50℃下在K 2 CO 3存在下在CO压力下进行时,以令人满意的收率获得酯。
COMPOSITIONS BASED ON 1,1,3,3-TETRACHLOROPROPENE
申请人:ARKEMA FRANCE
公开号:US20180148394A1
公开(公告)日:2018-05-31
The present invention relates to compositions based on F-1230za (1,1,3,3-tetrachloropropene), or on a mixture consisting of F-1230za and F-1230zd (1,3,3,3-tetrachloropropene), the manufacture thereof, and also the use thereof in particular for the production of F-1233zdE (trans-1-chloro-3,3,3-trifluoropropene), F-1234zeE (trans-1,3,3,3-tetrafluoropropene), and/or F-245fa (1,1,1,3,3-pentafluoropropane).
1,1,1,3,3-pentachloropropane process purge stream concentration using a secondary refluxed evaporator and secondary product recovery
申请人:VULCAN CHEMICALS DIVISION OF VULCAN MATERIALS COMPANY
公开号:US20030199716A1
公开(公告)日:2003-10-23
A process for economically producing 1,1,1,3,3-pentachloropropane under conditions which preserve the activity of the catalyst. In a preferred embodiment, a two-stage distillation process is employed. In the two-stage process, the size of the equipment, temperature and vacuum are varied.
Process for treating liquid chlorinated hydrocarbon wastes containing iron
申请人:STAUFFER CHEMICAL COMPANY
公开号:EP0094527A1
公开(公告)日:1983-11-23
Iron, such as ferric chloride, and other metallic impurities, contained in liquid chlorinated hydrocarbon waste streams, is removed by treatment of such streams with dilute aqueous mineral acid.