Intermolecular direct catalytic cross-Michael/Michael reactions and tandem Michael/Michael/aldol reactions to linear compounds
作者:Yuta Asaji、Hibiki Maruyama、Tomoyuki Yoshimura、Jun-ichi Matsuo
DOI:10.1016/j.tet.2022.132951
日期:2022.9
Catalytic cross-Michael/Michael reactions of nitroalkenes and ethyl acrylate with pronucleophiles including thiols, dimethyl methylmalonate, and 2-nitropropane to linear three-component products were developed by using a catalytic amount of DBU in DMSO. Tandem sulfa-Michael/Michael/aldol reactions of a thiol, a nitroalkene, ethyl acrylate, and an aldehyde proceeded to give a linear four-component product
通过在 DMSO 中使用催化量的 DBU,开发了硝基烯烃和丙烯酸乙酯与前亲核试剂(包括硫醇、甲基丙二酸二甲酯和 2-硝基丙烷)的催化交叉 Michael/Michael 反应生成线性三组分产物。硫醇、硝基烯烃、丙烯酸乙酯和醛的串联磺胺-迈克尔/迈克尔/醛醇反应进行得到线性四组分产物。DMSO 中原位形成的硝酸根阴离子和酯烯醇化物的高亲核性对于目前使用具有较高酸度质子的亲核试剂的多组分级联反应非常重要。