80194-71-4Relevant academic research and scientific papers
Preparation method of 2-cyano-3-fluoro-5-trifluoromethylpyridine
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Paragraph 0022-0034, (2021/02/24)
The invention discloses a preparation method of 2-cyano -3-fluorine -5-trifluoromethylpyridine, and belongs to the field of organic chemistry. The method comprises the following steps: by taking 2-cyano- 3-chloro -5-trifluoromethylpyridine as a raw material, carrying out heating reaction in a polar aprotic solvent in the presence of a fluorinating reagent and a phase transfer catalyst to obtain a2-cyano- 3-fluoro -5-trifluoromethylpyridine crude product; and after filtering and desalting, carrying out reduced pressure distillation to obtain the 2-cyano -3-fluoro-5-trifluoromethylpyridine withthe content of more than 99%. The method provided by the invention has the advantages of high yield, simple wastewater treatment and less three wastes, and the yield of 2-cyano -3-fluoro- 5-trifluoromethylpyridine can reach 95%.
SUBSTITUTED NITROGEN-CONTAINING SIX-MEMBERED AMINO-HETEROCYCLES AS VANILLOID-1 RECEPTOR ANTAGONISTS FOR TREATING PAIN
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Page/Page column 56, (2010/02/11)
The present invention provides a compound of formula (I): Y-J-NH-Z wherein: Y is a quinoline or isoquinoline optionally substituted with one or two substituents independently chosen from hydroxy, halogen, haloC1-4alkyl, C1-4alkyl, C1-4alkoxy, haloC1-4alkoxy, nitro and amino; J is pyridine, pyridazine, pyrazine, pyrimidine or triazine optionally substituted with one or two substituents independently chosen from hydroxy, halogen, haloC1-4alkyl, C1-4alkyl, C3-5cycloalkyl, C1-4alkoxy, hydroxyC1-4alkyl, cyano, hydroxy, C1-4cycloalkoxy, C1-4alkylthio, haloC1-4alkoxy, nitro, Q, (CH2)pQ, NR2R3, -(CH2)pNR2R3 and -O(CH2)pNR2R3; wherein J is substituted at positions meta to each other by NH and Y; and Z is phenyl or pyridyl optionally substituted with one or two substituents independently selected from halogen, haloC1-4alkyl, C1-4alkyl, C1-4alkoxy, haloC1-4alkoxy, nitro and amino; Q is phenyl, a five-membered heterocyclic ring containing one, two, three or four heteroatoms chosen from O, N and S, at most one heteroatom being O or S, or a six-membered heterocyclic ring containing one, two or three nitrogen atoms, optionally substituted by C1-4alkyl; each R2 and R3 is chosen from H and C1-4alkyl, or R2 and R3, together with the nitrogen atom to which they are attached, may form a six-membered ring optionally containing an oxygen atom or a further nitrogen atom, which ring is optionally substituted by C1-4alkyl or Q; p is 1, 2 or 3; or a pharmaceutically acceptable salt thereof; pharmaceutical compositions comprising it; its use in methods of therapy; use of it for manufacturing medicaments; and methods of using it to treat diseases requiring administration of a VR1 antagonist such as pain, cough, GERD and depression.
Pyridyl(oxy/thio)phenoxy compounds herbicidal compositions and methods
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, (2008/06/13)
Certain novel pyridinyloxyphenoxy alkanoic acids, pyridinylthiophenoxy alkanoic acids, derivatives thereof and related compounds are described. More specifically, these novel compounds bear a fluorine substituent in the 3-position of the pyridinyl group and in the 5-position the substituent is selected from chlorine, CF3, CF2 Cl or CF2 H. These novel compounds exhibit surprising preemergent and postemergent activity in the control of grassy weeds.
Certain pyridyloxy or thio-phenoxy-propanoic acids or salts thereof useful as herbicides
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, (2008/06/13)
Certain novel pyridinyloxyphenoxy alkanoic acids, pyridinylthiophenoxy alkanoic acids, derivatives thereof and related compounds are described. More specifically, these novel compounds bear a fluorine substituent in the 3-position of the pyridinyl group and in the 5-position the substituent is selected from chlorine, CF3, CF2 Cl or CF2 H. These novel compounds exhibit surprising preemergent and postemergent activity in the control of grassy weeds.
Pyridyl(oxy/thio)phenoxy compounds, herbicidal compositions and methods
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, (2008/06/13)
Certain novel pyridinyloxyphenoxy alkanoic acids, pyridinylthiophenoxy alkanoic acids, derivatives thereof and related compounds are described. More specifically, these novel compounds bear a fluorine substituent in the 3-position of the pyridinyl group and in the 5-position the substituent is selected from chlorine, CF3, CF2 Cl or CF2 H. These novel compounds exhibit surprising preemergent and postemergent activity in the control of grassy weeds.
2-Substituted-5-trifluoromethylpyridines and process for producing the same
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, (2008/06/13)
A 2-substituted-5-trifluoromethylpyridine compound represented by Formula (I): STR1 wherein X is a hydrogen atom or a halogen atom, and Y is a cyano group or a carboxy group, provided that Y is a cyano group, then X is a halogen atom, or a salt thereof, and a process for the production of the same. This compound is useful as an intermediate for the production of various fine chemicals.
