摘要:
The Rh-2(OAc)(4)-catalyzed oxonium ylide formation-[2,3]-sigmatropic rearrangement of a highly functionalized alpha-diazo-beta-keto ester derived from D-glucose proceeded stereoselectively to give the corresponding tetrahydrofuran-3-one as a single diastereomer in high yield. This reaction was applied to the synthesis of 2-epi-cinatrin C-1 dimethyl ester as a key step.