We report a facile synthesis of 3-amidino indoles from indoles and cyanamides. The reaction is Pd(II)-catalyzed and proceeds via C–H bond activation of the indole in its 3-position followed by a 1,2-addition of the resulting indole–palladium σ-complex to a cyanamide, which provides the corresponding amidine. The preference for 4,5-diazafluoren-9-one (DAF) as the ligand is investigated using DFT calculations
我们报道了从
吲哚和
氰胺类化合物轻松合成3-ami基
吲哚类化合物。该反应是Pd(II)催化的,通过
吲哚在其3-位的CH键活化,然后将所得的
吲哚-
钯σ-络合物1,2-加至
氰胺中,从而提供相应的反应。 idine。使用DFT计算研究了
4,5-二氮杂芴-9-one(
DAF)作为
配体的偏好,并提出了合理的反应途径。