Unexpected Selectivity between Pinacolic Rearrangement and Intramolecular Displacement in the Acid-Promoted Epoxide Ring-Opening of 6-Exo-Cyano-3,8-Dioxabicyclo[3.2.1.0(2,4)]Oct-6-Endo-Yl Esters
Allemann, S.; Vogel, P.
1994

Abstract

Acid promoted epoxide ring opening of 2-exo-cyano-5-exo,6-exo-epohy-7-oxa-bicyclo[2.2.1]hept-2-endo-yl acetate is accompanied by a Wagnet-Meerwein (pinacolic) rearrangemant when run in CH2Cl2/HSO3-F and by endo acetoxy group participation when run in CF3CH(OH)CF3/HClO4. An efficient and stereoselective trans-double hydroxylation of centers C(5) and C(6) of the ''naked sugar'' (1R,2S,4R)-2-exo-cyano-7-oxabicyclo[2.2.1]hept-2-endo-yl (1S')-camphanate is also presented.

Details

Title Unexpected Selectivity between Pinacolic Rearrangement and Intramolecular Displacement in the Acid-Promoted Epoxide Ring-Opening of 6-Exo-Cyano-3,8-Dioxabicyclo[3.2.1.0(2,4)]Oct-6-Endo-Yl Esters
Author(s) Allemann, S. ; Vogel, P.
Published in Tetrahedron
Volume 50
Issue 8
Pages 2469-2478
Date 1994
ISSN 0040-4020
Keywords
Note Univ lausanne,chim sect,ch-1005 lausanne,switzerland.
DOI https://doi.org/10.1016/S0040-4020(01)86963-5
Laboratories LGSA
Record Appears in Scientific production and competences > SB - School of Basic Sciences > SB Archives > LGSA - Laboratory of Glycochemistry and Asymmetric Synthesis
Peer-reviewed publications
Work produced at EPFL
Journal Articles
Published
Record creation date 2005-11-09