and tetrahydropyrido[1,2-a]indoles. The synthesis involves concurrent tandem catalysis by Sc(OTf)3 and Rh2(OAc)4. The role of Sc(OTf)3 is critical as it facilitates both the initial intermolecular Michael reaction of the indole and the subsequent Rh(II)-catalyzed intramolecular annulation. The products, tetrahydrocarbazoles and tetrahydropyridoindoles, are equipped with a β-ketoester and ester functionalities
已经开发出高度官能化且易于获得的六碳重氮结构单元,并将其用作1,4-二烯基受体,以有效合成官能化的四氢
咔唑,
咔唑和四氢
吡啶并[1,2- a ]
吲哚。该合成涉及由Sc(OTf)3和Rh 2(OAc)4同时进行的串联催化。Sc(OTf)3的作用至关重要,因为它促进了
吲哚的初始分子间迈克尔反应和随后的Rh(II)催化的分子内环化反应。产物四氢
咔唑和四氢
吡啶并
吲哚配有β-
酮酸酯和酯官能团,可用于进一步合成合成。