A new route to pyrazolo[3,4-c] and [4,3-c]pyridinones via heterocyclization of vic-substituted hydroxamic acids of acetylenylpyrazoles
作者:Elena V. Mshvidobadze、Sergei F. Vasilevsky、Jose Elguero
DOI:10.1016/j.tet.2004.09.104
日期:2004.12
We report in this paper the synthesis of 6-substituted pyrazolo[4,3-c]pyridin-4-ones, 6-substituted 5-hydroxypyrazolo[4,3-c]pyridin-6-ones, 5-substituted pyrazolo[3,4-c]pyridin-7-ones and 5-substituted 6-hydroxypyrazolo[3,4-c]pyridin-7-ones by heterocyclization of vic-acetylenylpyrazol-hydroxamic acids under the influence of copper(I) salt in dimethylformamide or with organic bases in butanol or methanol
我们在本文中报道了6-取代的吡唑并[4,3 - c ]吡啶-4-酮,6-取代的5-羟基吡唑并[4,3 - c ]吡啶-6-酮,5-取代的吡唑并[3]的合成。 ,4- ç ]吡啶-7-酮和5-取代的6-羟基吡并[3,4- c ^ ]吡啶-7-酮由heterocyclization VIC -acetylenylpyrazol-异羟肟酸铜的影响下(I)盐在二甲基甲酰胺或与丁醇或甲醇中的有机碱混合。