Reactions of 1-Substituted-polyfluoro-1-propenyl<i>p</i>-Toluenesulfonates with Bifunctional Nitrogen Nucleophiles. A New Expedient Access to Monofluorinated Nitrogen Heterocycles
作者:Kazumasa Funabiki、Tetsuya Ohtsuki、Takashi Ishihara、Hiroki Yamanaka
DOI:10.1246/cl.1995.239
日期:1995.3
1-Substituted-2,3,3-trifluoro-1-propenyl p-toluenesulfonates, readily available by the alkylation or arylation of 2,3,3-trifluoro-1-tosyloxy-1-propenyllithium or -zinc reagent, reacted smoothly with amidine or hydrazine derivatives at 70 °C for 1 h to give the corresponding 5-fluoropyrimidine or 4-fluoropyrazole compounds, respectively, in moderate to excellent yields.
1-取代-2,3,3-三氟-1-丙烯基对甲苯磺酸盐,可通过2,3,3-三氟-1-甲苯磺氧基-1-丙烯基锂或锌试剂的烷基化或芳基化容易获得,与脒或肼衍生物在70℃下反应1小时,分别得到相应的5-氟嘧啶或4-氟吡唑化合物,产率中等至优异。