- Iron-Catalyzed Sulfur-Promoted Decyanative Redox Condensation of o-Nitrophenols and Arylacetonitriles: An Unprecedented Route to 2-Arylbenzoxazoles
-
Elemental sulfur in the presence of a catalytic amount of FeCl2·4H2O was found to be highly efficient for the promotion of decyanative redox condensation reactions of o-nitrophenols with arylacetonitriles, to give a wide range of 2-arylbenzoxazoles. The utility of elemental sulfur was highlighted by its role as cyanide scavenger and external reducing agent.
- Nguyen, Thanh Binh,Lung, Jerome Cheung
-
supporting information
p. 5815 - 5818
(2018/11/24)
-
- Kinase inhibitor, and preparation and application of kinase inhibitor
-
The invention provides a compound shown as a formula (I), or a stereoisomer, a tautomer, nitrogen oxide, metabolite, a prodrug, pharmaceutically acceptable salt or solvate of the compound, and application of the compound to preparing drugs or drug compositions for treating Pim kinase-mediated diseases.
- -
-
-
- New facile and mild synthesis of 2-substituted oxazolopyridines
-
A new, two-step synthesis of oxazolopyridines is described. The synthesis involving amide formation between o-aminopyridinols and aliphatic or aromatic carboxylic acids followed by condensation with hexachloroethane/ triphenylphosphine takes place at room
- Heuser, Stefan,Keenan, Martine,Weichert, Andreas G.
-
p. 9001 - 9004
(2007/10/03)
-
- Process for the synthesis of oxazolopyridine compounds
-
Process for the synthesis of compounds of formula (I): STR1 their pyridinium salts and N-oxides, in which formula: the nitrogen of the pyridine ring is situated in the α-, β-, γ- or δ-position with respect to the ring junction; R1 represents a halogen, a substituted or unsubstituted alkyl, a substituted or unsubstituted alkoxy or a nitro, substituted or unsubstituted amino, phenyl or cyano group; 0≤m≤2; R2 represents a lower alkyl or cycloalkyl group, a 5- or 6-membered heterocycle containing 1 or 2 hetero atoms, substituted or otherwise, or an aryl group STR2 such that: R3 represents a halogen, a substituted or unsubstituted alkyl, a substituted or unsubstituted alkoxy or a nitro, phenyl, substituted or unsubstituted sulfonyl, cyano, thioalkyl, substituted or unsubstituted amino, substituted or unsubstituted sulfinyl, mercapto, hydroxyl or ester group, 0≤n≤5 employing trimethylsilyl polyphosphate (PPSE) as a cyclization agent and enabling the compounds of formula (I) to be obtained in virtually quantitative yields. The compounds of formula I have anti-inflammatory, analgesic, and antipyretic activity.
- -
-
-
- Anti-inflammatory oxazole[4,5-b]pyridines
-
The various isomers of oxazolo- and thiazolopyridines having utility as antiinflammatory, antipyretic and analgesic agents are prepared by condensation of an appropriate amino-hydroxypyridine or amino-mercaptopyridine with a carboxylic acid, halide or anhydride.
- -
-
-