Chiral Conducting Salts of Nickel Dithiolene Complexes
摘要:
Conducting and chiral [Ni(dmit)(2)] dithiolene salts were obtained by electrocrystallization of the radical [n-Bu4N][Ni(dmit)(2)] salt in the presence of chiral, enantiopure trimethylammonium cations. Three different cations were investigated, namely, (R)-Ph(Me)HC*-NMe3+, (S)-(Bu-t)(Me)HC*-NMe3+, and (S)-(1-Napht)MeHC*-NMe3+, noted (R)4, (S)-2, and (S)-3. Salts of 1:3 stoichiometry were obtained with (R)-1 and (S)-2, formulated as [(R)-1][Ni(dmit)(2)](3) and [(S)-2][Ni(dmit)(2)](3)center dot(CH3CN)(2). They both crystallize in the P2(1)2(1)2(1) chiral space group, with three crystallographically independent complexes exhibiting different oxidation degrees. Another salt with 2:5 stoichiometry was isolated with (S)-3. The semiconducting character of the three salts (sigma(RT) = 20-30 X 10(-3) S cm(-1)) finds its origin in a strong electron localization, favored by the large number of crystallographically independent [Ni(dmit)2] complexes in these chiral structures and their association into weakly interacting dimeric or trimeric motifs. Racemic salts with the same cations, obtained only with difficulties with the tert-butyl-containing (rac)-2 cation, afforded similar trimerized structures. The observed unusual stoichiometry and strong charge localization is tentatively assigned to the size and anisotropic charge distribution of the cations.
Catalyst-Free and Selective C–N Bond Functionalization: Stereospecific Three-Component Coupling of Amines, Dichloromethane, and >P(O)H Species Affording α-Aminophosphorus Compounds
作者:Yalei Zhao、Xiuling Chen、Tieqiao Chen、Yongbo Zhou、Shuang-Feng Yin、Li-Biao Han
DOI:10.1021/jo501961h
日期:2015.1.2
and selective C–N bond functionalization has been achieved through three-component coupling of amines, dihalomethane, and >P(O)H species. This reaction takes place stereospecifically with retention of configuration at phosphorus, which can produce various new opticallyactive phosphorus analogues of α-amino acids.
The invention provides compounds of formula (I):
wherein the variables are defined in the specification, or a pharmaceutically-acceptable salt thereof, that are inhibitors of replication of the hepatitis C virus. The invention also provides pharmaceutical compositions comprising such compounds, methods of using such compounds to treat hepatitis C viral infections, and processes and intermediates useful for preparing such compounds.
[EN] PROCESS FOR PREPARING DONEPEZIL HYDROCHLORIDE FORMS I AND III; AND AN INTERMEDIATE COMPOUND THEREOF<br/>[FR] PROCÉDÉ DE PRÉPARATION DES FORMES I ET III DU CHLORHYDRATE DE DONÉPÉZIL ET D'UN COMPOSÉ INTERMÉDIAIRE CORRESPONDANT
The present invention relates to a new efficient and industrially feasible process for the preparation of the commercial crystalline forms of donepezil hydrochloride Form I and III, with high purity and in a selective manner. This invention also relates to a new process for preparing an intermediate compound useful in the preparation of donepezil hydrochloride.
NOVEL SULFONE DERIVATIVES AND PROCESS FOR PRODUCING THESE
申请人:SUMITOMO CHEMICAL COMPANY LIMITED
公开号:EP1359143A1
公开(公告)日:2003-11-05
There are provided production processes for cyclic sulfone compounds of formula (2) or (4):
or
wherein the dashed lines represent that a double bond is present at one of three positions indicated; Ar and the wavy line are as defined below, characterized in that compounds of formula (1) or (3):
or
wherein Ar is aryl optionally having a substituent(s) and the wavy line represents either one of E/Z geometrical isomers or their mixture, is subjected to cyclization in the presence of an acid catalyst. These processes are excellent processes as the production processes for retinol from the viewpoints of raw material costs, intermediate purification, the number of steps, and the like.
ELECTROLYTE FOR ELECTROLYTIC CAPACITOR, ELECTROLYTIC CAPACITOR AND PROCESS FOR PRODUCING TETRAFLUOROALUMINATE SALT OF ORGANIC ONIUM
申请人:Takeda Masayuki
公开号:US20070188977A1
公开(公告)日:2007-08-16
There are provided an aluminum electrolytic capacitor comprising an anode, a cathode comprising aluminum and an electrolytic solution containing an onium salt of fluorine-containing anion, wherein the electrolytic solution has a water concentration of 1% by weight or less, or wherein the cathode has a peak top of Al2p spectrum of 74.0 to 75.8 eV as measured by a method in which the surface of the cathode in the aluminum electrolytic capacitor heated at 125° C. for 50 hours is analyzed by X-ray photoelectron spectroscopy (XPS); an electrolytic solution for electrolytic capacitor comprising a quaternary cyclic amidinium tetrafluoroaluminate and a solvent and containing specific impurity compounds in a total amount of 0.6% by weight or less, and an electrolytic capacitor using the electrolytic solution; and a method for preparing an organic onium tetrafluoroaluminate which is advantageously used in an aluminum electrolytic capacitor.