Flexible Strategy for Differentially 3,5-Disubstituted 4-Oxypyridin-2(1H)-ones Based on Site-Selective Pd-Catalyzed Cross-Coupling Reactions
摘要:
3,5-Dihalogeno-4-methoxy-N-methylpyridin-2(1H)-ones have been shown to undergo single Suzuki coupling reactions in a site-selective fashion. Monoarylations occur at the C-5 position preferentially, thus leaving the remaining C-3 halide free for further functionalization, to finally access differentially 3,5-disubstituted 2-pyridones. This two-step strategy has been applied to the elaboration of the 3-acyl-5-aryl-4-oxy-2-pyridone subunit that is prevalent in numerous bioactive natural products.
[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.
Buck, Judith; Madeley, J. Paul; Pattenden, Gerald, Journal of the Chemical Society. Perkin transactions I, 1992, # 1, p. 67 - 73
作者:Buck, Judith、Madeley, J. Paul、Pattenden, Gerald
DOI:——
日期:——
Flexible Strategy for Differentially 3,5-Disubstituted 4-Oxypyridin-2(1<i>H</i>)-ones Based on Site-Selective Pd-Catalyzed Cross-Coupling Reactions
3,5-Dihalogeno-4-methoxy-N-methylpyridin-2(1H)-ones have been shown to undergo single Suzuki coupling reactions in a site-selective fashion. Monoarylations occur at the C-5 position preferentially, thus leaving the remaining C-3 halide free for further functionalization, to finally access differentially 3,5-disubstituted 2-pyridones. This two-step strategy has been applied to the elaboration of the 3-acyl-5-aryl-4-oxy-2-pyridone subunit that is prevalent in numerous bioactive natural products.