A Five-Step Synthesis of (±)-Tylophorine via a Nitrile-Stabilized Ammonium Ylide
作者:Günther Lahm、Alexander Stoye、Till Opatz
DOI:10.1021/jo3011045
日期:2012.8.3
The Stevens rearrangement of a nitrile-stabilized ammonium ylide is the key step of a very short and practical synthesis of the phenanthroindolizine alkaloid (±)-tylophorine. The method requires only five linear steps and is devoid of any protecting group manipulations.