在一个锅中,通过胰蛋白酶和环烷酮的缩合,在多磷酸盐酯的存在下,在一个锅中进行1,2,3,4-四氢-(9 H)-吡啶并[3,4- b ]吲哚衍生物的合成。中等至低收率的催化剂,醛醇缩合是主要产物。色胺与环酮的反应也通过亚胺中间体在两个阶段进行,并带有质子催化,得到高产率的四氢-β-咔啉8-14。使用甲基碘在二甲基亚砜-碳酸钾中的高产率获得了四氢-β-咔啉的2-甲基衍生物15-21。
Two‐in‐One Strategy for Palladium‐Catalyzed C−H Functionalization in Water
作者:Huiying Zeng、Zemin Wang、Chao‐Jun Li
DOI:10.1002/anie.201813391
日期:2019.2.25
Transition metal catalyzedC−Hfunctionalizations have been developed as powerful methods for C−C bond formations. Directing groups, removable directing groups, traceless directing groups, and transient directing groups (TDGs) have been successfully used to improve the reaction efficiencies. For the development of greener and more sustainable methods, C−Hfunctionalization using a TDG that also serves