polynomials. The materials investigated in the present study included two families of ILs such as ammonium salts and imidazolium salts. Diethylammonium acetate ([Et2NH][CH3COO], DEAA), triethylammonium actetate ([Et3NH][CH3COO], TEAA), triethylammonium dihydogen phosphate ([Et3NH][H2PO4], TEAP), and triethylammonium sulfate ([Et3NH][HSO4], TEAS) are ammonium salts and 1-benzyl-3-methylimidazolium chloride ([Bmim][Cl])
This invention relates to nicotinamide derivatives of general formula (I):
in which R
1
, Z and R
2
have the meanings defined herein, and to processes for the preparation of, intermediates used in the preparation of, compositions containing and the uses of such derivatives.
Process for the production of fluorinated organic compounds and fluorinating agents
申请人:——
公开号:US20030176747A1
公开(公告)日:2003-09-18
A process for the production of a fluorinated organic compound, characterized by fluorinating an organic compound having a hydrogen atoms using IF
5
; and a novel fluorination process for fluorinating an organic compound having a hydrogen atoms by using a fluorinating agent containing IF
5
and at least one member selected from the group consisting of acids, bases, salts and additives.
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
The present invention relates to the acetate salt of Mirabegron, in particular in two novel crystalline forms, a process for their preparation and the use of said salt and its crystalline forms in the synthesis of Mirabegron with high yields and chemical purity.