An organocatalytic hydroalkoxylation/Claisen rearrangement/Michael addition tandem sequence: divergent synthesis of multi-substituted 2,3-dihydrofurans and 2,3-dihydropyrroles from cyanohydrins
作者:Zhen Sun、Zheng Li、Wei-Wei Liao
DOI:10.1039/c8gc03978j
日期:——
sequence is reported. The operational simplicity of the method allows for greater efficiency in the synthesis of a wide range of functionalized 2,3-dihydrofurans and 2,3-dihydropyrroles from readily accessible allylic cyanohydrins and activated alkynes in good to excellent yields under optimal conditions.
Intramolecular Pd-catalysed cyclisation reactions for the preparation of bicyclic compounds have been studied as a model system towards the synthesis of corialstonine and corialstonidine. Significant differences in reactivity have been observed for the cyclic allyl alcohols possessing O-protected and free OH functionalities. Cyclisation via the intramolecularHeckreaction, for both derivatives, proved