PROCESS FOR PREPARATION OF SUCCINYLCHOLINE CHLORIDE
申请人:SEQUENT SCIENTIFIC LIMITED
公开号:US20140100385A1
公开(公告)日:2014-04-10
The present invention relates to a process for the preparation of succinylcholine chloride, a pharmaceutically active compound used as skeletal muscle relaxant which comprises condensing succinic anhydride with N,N-diemthylaminoethanol using a catalyst in presence of a solvent to form bis[2-(dimethylamino)ethyl]succinate; in situ purifying the bis[2-(dimethylamino)ethyl]succinate using a base; reacting pure bis[2-(dimethylamino)ethyl]succinate with methyl chloride gas using an alcohol; and purifying the obtained crude succinylcholine chloride using water and alcohol.
[EN] PREPARATION OF SUBSTITUTED 3-ARYL-5-TRIFLUOROMETHYL-1,2,4-OXADIAZOLES<br/>[FR] PRÉPARATION DE 3-ARYL-5-TRIFLUOROMÉTHYL-1,2,4-OXADIAZOLES SUBSTITUÉS
申请人:BASF SE
公开号:WO2019020501A1
公开(公告)日:2019-01-31
The present invention relates to a process for the preparation of 3-aryl-5-trifluoromethyl-1,2,4- oxadiazoles, which are useful as fungicidal compounds or as intermediates for the synthesis of fungicidal oxaciazole compounds, using trifluoroacetyl halides.
Quaternaryammoniumsalts were synthesized from ammoniumsalts and dialkyl carbonates over imidazolium ionic liquid catalysts. The reaction gave almost stoichiometric amounts of the quaternaryammoniumsalts for halides and nitrates. It was found that the electron-donating property of the alkyl moieties of ammonium cations, the electrophilic nature of the alkyl group of the carbonate, the acidity of
Preparation of novel, moisture-stable, Lewis-acidic ionic liquids containing quaternary ammonium salts with functional side chains
作者:Andrew P. Abbott、Glen Capper、David L. Davies、Helen L. Munro、Raymond K. Rasheed、Vasuki Tambyrajah
DOI:10.1039/b106357j
日期:——
A range of novel, moisture-stable, Lewis-acidic ionicliquids has been prepared by mixing appropriate molar ratios of MCl2 (M = Zn and/or Sn) and quaternaryammoniumsalts of formula [Me3NC2H4Y]Cl (Y = OH, Cl, OC(O)Me, OC(O)Ph); the influence of substituent Y and metal M on the physical properties of the melts has been investigated.
Thermodynamic aspects of the host–guest chemistry of pyrogallol[4]arenes and peralkylated ammonium cations
作者:Bjoern Schnatwinkel、Mikhail V. Rekharsky、Ralf Brodbeck、Victor V. Borovkov、Yoshihisa Inoue、Jochen Mattay
DOI:10.1016/j.tet.2009.01.066
日期:2009.3
standard free energy (ΔGo), enthalpy (ΔHo), and entropy changes (ΔSo) for the complexation of pyrogallol[4]arenes with ammonium cations of different size and shape have been determined in ethanol at 298 K by isothermal titration calorimetry. The trends observed in the thermodynamic parameters for 1:1 and/or 1:2 host–guestcomplexation correspond to the systematic structural changes of the guest molecules