2,3-Dihydropyrrole-2,3-diones 1 thermally extrude CO, giving imidoylketenes 2, which cyclse efficiently to 4-quinolones 3; however, the analogous nitro(imidoyl)ketene 5 eliminates CO2 and rearranges to the 3-oximino-3H-indole 9, presumably via an imidoylnitrile oxide 7.
Microwave-Induced Molecular Rearrangements. Flash Thermolysis in the Gas-Phase and in Solution: Synthesis of Quinolones and Naphthyridones
作者:Delphine Lecoq、Benjamin A. Chalmers、Rakesh N. Veedu、David Kvaskoff、Paul V. Bernhardt、Curt Wentrup
DOI:10.1071/ch09447
日期:——
3- and 4-Pyridyliminopropadienones were prepared by flash vacuum thermolysis of Meldrum’s acid derivatives and characterized by low temperature IR spectroscopy. They react with dimethylamine to afford 1,5-, 1,6-, and 1,7-naphthyridones. The same naphthyridones are also obtained by microwave irradiation of the Meldrum’s acid derivatives. Quinolones were obtained by microwave irradiation of phenylam
Synthesis of 3-phenylisoquinolones by reaction of simple pyrroline-2,3-diones with benzyne. New mechanistic considerations
作者:Agustin Cobas、Enrique Guitian、Luis Castedo
DOI:10.1021/jo00063a034
日期:1993.5
3-Phenylisoquinolones were obtained by cycloaddition of benzyne to 5-phenylpyrroline-2,3-diones. New mechanistic hypotheses for these transformations are discussed.
EISTERT B.; MUELLER G. W.; ARACKAL T. J., J. LIEBIGS ANN. CHEM. <JLAC-BF>, 1976, NO 6, 1023-1030
作者:EISTERT B.、 MUELLER G. W.、 ARACKAL T. J.
DOI:——
日期:——
[EN] DIHALOGENATION OF N,O-DISUBSTITUTED HYDROXIPYRIDONES AND USES THEREOF<br/>[FR] DIHALOGENATION D'HYDROXIPYRIDONES N,O-DISUBSTITUEES ET LEURS UTILISATIONS
申请人:BAYER CROPSCIENCE SA
公开号:WO2007006591A2
公开(公告)日:2007-01-18
[EN] The invention concerns a method for preparing N, O-disubstituted 3,5-dihalogeno-4-hydroxypyridin-2(1H)one. Said compounds may be symmetrical and are particularly useful for synthesis of compounds with agrochemical or pharmaceutical activity. [FR] Procédé pour la préparation de 3,5-dihalogéno-4-hydroxypyridin-2(1H)-one N,O-disubstituées. Ces composés peuvent être symétriques ou non symétriques et sont notamment utiles pour la synthèse de composés à activité agrochimique ou pharmaceutique.