Ring-Rearrangement Metathesis of Nitroso Diels-Alder Cycloadducts
作者:Guillaume Vincent、Cyrille Kouklovsky
DOI:10.1002/chem.201002558
日期:2011.3.1
various ring sizes, which contain a NO bond. These scaffolds are of synthetic relevance for the generation of molecular diversity and to the total synthesis of alkaloids. The observation of unexpected reactions, such as epimerization or one‐carbon homologation of the alkene side chain, is also reported.
Synthetic Approaches to Racemic Porantheridine and 8-Epihalosaline via a Nitroso Diels−Alder Cycloaddition/Ring-Rearrangement Metathesis Sequence
作者:Pierre Sancibrao、Delphine Karila、Cyrille Kouklovsky、Guillaume Vincent
DOI:10.1021/jo100768d
日期:2010.6.18
Diels−Alder cycloaddition and a ring-rearrangementmetathesis to the total synthesis of (±)-8-epihalosaline and the formal synthesis of (±)-porantheridine is described. The formation of the 2,6-trans-disubstituted piperidine backbone of porantheridine has been accomplished by addition of a Grignard reagent onto an N-benzylpiperidone followed by a highly diastereoselective reduction of the imminium intermediate