The one-pot three-component addition reaction of trimethylsilylacetylene, aldehydes and dibenzylamine provides in the presence of CuBr/Quinap as catalyst, various enantiomerically enriched propargylamines in good yields (up to 99%) and excellent enantiomeric excess (up to 98%
ee) which can be used as a key intermediate in the synthesis of the alkaloid (S)-(+)-coniine.
三甲基
硅乙炔、醛和
二苄胺在CuBr/喹纳普催化剂存在下的一锅三组分加成反应,可以高产率(高达99%)和极佳的非对映选择性(高达98% ee)合成多种手性富集的
炔丙基胺,这些产物可作为合成
生物碱(S)-(+)-
毒芹碱的关键中间体。