Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Article, Research Support, Non-U.S. Gov’t, Organic Letters called The Kondrat’eva Reaction in Flow: Direct Access to Annulated Pyridines, Author is Lehmann, Johannes; Alzieu, Thibaut; Martin, Rainer E.; Britton, Robert, which mentions a compound: 118994-89-1, SMILESS is O=C(C1=CN=CO1)OCC, Molecular C6H7NO3, Recommanded Product: Ethyl oxazole-5-carboxylate.
A continuous flow inverse-electron-demand Kondrat’eva reaction has been developed that provides direct access to cycloalka[c]pyridines from unactivated oxazoles and cycloalkenes. The cycloadditions of both unactivated alkenes and deactivated oxazoles are promoted in continuous flow at elevated temperatures and pressures (230 °C, 750psi). E.g., reaction of 5-phenyloxazole and cyclopentene in presence of TFA gave 55% 4-phenyl-6,7-dihydro-5H-cyclopenta[c]pyridine (I). Annulated pyridines obtained by this one-step process are valuable scaffolds for medicinal chem.
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