Transacetalization reaction of the diethoxymethyl (DEM) protected pyrroles 2a-f with the diol functionalized resin 3 resulted in the formation of the immobilized pyrroles 4a-f. Regioselective transformations including Pd-catalyzed coupling reactions and reductive aminations on solid phase were demonstrated.
受二乙氧基甲基(D
EM)保护的
吡咯 2a-f 与二元醇功能化
树脂 3 发生反
乙醛化反应,生成固定化
吡咯 4a-f。实验证明了固相上的区域选择性转化,包括 Pd 催化的偶联反应和还原胺化反应。