Activation and Substitution of 1-Ferrocenylalkylamines with Allenones: Application to Three-Component Synthesis of 4-(1-Ferrocenylalkyl)pyrazoles
作者:Zhixiong Chen、Lu Han、Shi-Kai Tian
DOI:10.1021/acs.orglett.7b02830
日期:2017.11.3
A one-pot, two-step three-component synthesis of 4-(1-ferrocenylalkyl)pyrazoles has been developed involving activation and substitution of 1-ferrocenylalkylamines with allenones under mild conditions. A range of 1-ferrocenylalkylamines reacted with allenones in the presence of dipicolinic acid at room temperature without extrusion of air and moisture, and the resulting crude products were treated
已经开发出一锅,两步三组分合成4-(1-二茂铁基烷基)吡唑的方法,包括在温和条件下用烯丙基活化和取代1-二茂铁基烷基胺。在室温下,在存在吡啶二甲酸的情况下,一定范围的一系列1-二茂铁基烷基胺与烯丙基反应,而没有空气和湿气的挤出,并将所得粗产物用肼处理,得到结构多样的4-(1-二茂铁基烷基)吡唑,中等至良好。产量。而且,三组分反应成功地扩展到对映体富集的α-二茂铁基苄基胺,并且完全保留了构型。