FeCl3-Catalyzed Highly Diastereoselective Synthesis of Substituted Piperidines and Tetrahydropyrans
摘要:
The eco-friendly and highly diastereoselective synthesis of substituted cis-2,6-piperidines and cis-2,6-tetrahydropyrans is described. The key step of this method is the iron-catalyzed thermodynamic equilibration of 2-alkenyl 6-substituted piperidines and 2-alkenyl 6-substituted tetrahydropyrans allowing the isolation of enriched mixtures of the most stable cis-isomers.
FeCl3·6H2O-catalyzed synthesis of substituted cis-2,6-tetrahydropyrans from ζ-hydroxy allylic derivatives
摘要:
A highly diastereoselective iron-catalyzed synthesis of substituted cis-2,6-tetrahydropyrans from zeta-hydroxy allylic derivatives is described. The FeCl3 center dot 6H(2)O-induced epimerization of the formed 2-alkenyl 6-substituted tetrahydropyrans is the key reaction to account for the high diastereoselectivities observed. (C) 2011 Elsevier Ltd. All rights reserved.
The eco-friendly and highly diastereoselective synthesis of substituted cis-2,6-piperidines and cis-2,6-tetrahydropyrans is described. The key step of this method is the iron-catalyzed thermodynamic equilibration of 2-alkenyl 6-substituted piperidines and 2-alkenyl 6-substituted tetrahydropyrans allowing the isolation of enriched mixtures of the most stable cis-isomers.
FeCl3·6H2O-catalyzed synthesis of substituted cis-2,6-tetrahydropyrans from ζ-hydroxy allylic derivatives
A highly diastereoselective iron-catalyzed synthesis of substituted cis-2,6-tetrahydropyrans from zeta-hydroxy allylic derivatives is described. The FeCl3 center dot 6H(2)O-induced epimerization of the formed 2-alkenyl 6-substituted tetrahydropyrans is the key reaction to account for the high diastereoselectivities observed. (C) 2011 Elsevier Ltd. All rights reserved.