1735-84-8Relevant articles and documents
Banks, R. E.,Haszeldine, R. N.,Latham, J. V.,Young, I. M.
, (1965)
Preparation method of 4-aminopyridine compound
-
, (2021/02/06)
The invention discloses a preparation method of a 4-aminopyridine compound. The preparation method comprises the following steps: adding a 4-amino- 3-chloropyridine compound or a 4-amino-3, 5-dichloropyridine compound, potassium phosphate and a catalyst into a solvent, and reacting at 0-10 MPa and 0-100 DEG C for 4-12 hours. According to the preparation method of the 4-aminopyridine compound, therelated raw materials are easy to obtain or self-make, the cost is low, the preparation method is simple, the reaction efficiency is high, the raw material cost is low, and byproducts have economic value; meanwhile, the reaction involved in the invention has good universality and tolerance to functional groups.
METHOD FOR PRODUCING A COMPOUND CONTAINING FLUORINE VIA FLUORINE-HALOGEN EXCHANGE BY SPECIAL POLYAMINO PHOSPHAZENE CATALYSTS
-
Page 20, (2008/06/13)
The invention relates to a method for producing compounds containing fluorine by reacting a compound, which contains hydrogen that can be exchanged for fluorine, with a fluoride or with a mixture of fluorides of general formula (I): MeF, wherein Me represents an alkaline earth metal ion, an NH4+ ion or an alkali metal ion, in the presence or absence of a solvent at a temperature ranging from 60 to 260 °C. The invention is characterized in that the reaction is carried out in the presence of a compound or of a mixture of compounds of general formula (IIa) and/or (IIb), whereby X1 and/or X2 and/or X3, independent of one another, have groups of formula (llc) or other groups cited in the claims.
POLYHALOAROMATIC EQUILIBRATIONS
Weigert, F. J.
, p. 33 - 42 (2007/10/02)
Chromium oxide is a good catalyst for scrambling halogens among polyhaloaromatic compounds.Chloropentafluorobenzene and bromopentafluorobenzene disproportionate to hexafluorobenzene and the respective tetrafluorodihalobenzenes.Pentachloro- and pentafluoropyridines produce pyridines with intermediate numbers of both types of halogens.Cyano, trifluoromethyl and a single hydrogen can be present on the aromatic rings without interfering with the chemistry.