Stereoselektive Synthese von Cyclopropylkohlenhydraten

Abstract

Stereoselective synthesis of cyclopropylsugars Use of the phase‐transfer catalysis significantly increased the yield of the reactions leading to the known compounds 2 and 3 . Stereoselective cyclopropylation of 3 and 4 and 8 , was brought about using in the first instance the Simmons‐Smith 's reagent, whereas the reaction of dichlorocarbene led to 6 easily dechlorinated to 8 . Both diastereoisomeric cyclopropylsugars 4 and 8 were transformed into the corresponding ethyl glycosides.