Oxidative Pictet-Spengler cyclisations through acceptorless iridium-catalysed dehydrogenation of tertiary amines
作者:John P. Cooksey、Ourida Saidi、Jonathan M.J. Williams、A. John Blacker、Stephen P. Marsden
DOI:10.1016/j.tet.2020.131785
日期:2021.1
The valuable tetrahydro-β- and γ-carboline skeleta can be accessed through Pictet-Spenglercyclisation initiated by acceptorless dehydrogenation of saturated cyclic amines. The substrate scope for the β-isomers is found to be somewhat limited, but access to the γ-isomers through the more reactive 2-(aminoethyl)indoles is more general. The synthetic utility of hydrogen transfer catalysis is highlighted