ChemInform Abstract: Stereoselective Synthesis of Tetrahydrofurans and Linear Methyl Enol‐Ethers from Glycals.

Abstract

Stereoselective Synthesis of Tetrahydrofurans and Linear MethylEnol-Ethers from Glycals.-A general method is reported, which leads either to a ring-contraction or to ring-opening compounds with complete stereoselectivity. The flexibility and the utility of the method are shown by the TTN-promoted ring-transformations of cyclic enol-ethers such as aucubin (XI). -(BETTELLI, E.; D'ANDREA, P.; MASCANZONI, S.; PASSACANTILLI, P.; PIANCATELLI, G.; Carbohydr. Res. 306 (1998) 1-2, 221-230; Cent. Stud.