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DOI: 10.1055/s-0031-1289544
Synthesis of 1,2,3-Trisubstituted Pyrrolidines and 2,3-Disubstituted Tetrahydrofurans via Diastereoselective Reductive Cyclization of γ-Chloroimines and γ-Chloroketones
Publication History
Publication Date:
19 October 2011 (online)

Abstract
A new diastereoselective synthetic approach towards 1,2,3-trisubstituted pyrrolidines and 2,3-disubstituted tetrahydrofurans is described. The synthesis of the pyrrolidines involves reductive cyclization of γ-chloroketimines, which were generated in situ from the reaction of 3-substituted 5-chloro-2-pentanones and a primary amine. Various reduction conditions were explored to induce a diastereoselective reductive cyclization. 2,3-Disubstituted tetrahydrofurans were obtained by the direct reduction of 3-substituted 5-chloro-2-pentanones with sodium borohydride.
Key words
pyrrolidines - tetrahydrofurans - cyclization - haloimines - haloketones
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References and Notes
Postdoctoral Fellow of the Research Foundation-Flanders (FWO).