An approach to the stereocontrolled synthesis of the protected form of sphingofungin E (32) starting from the known protected d-glucose derivative 3 is described herein. For the construction of a tetrasubstituted carbon atom that is substituted with nitrogen, the [3,3]-sigmatropic rearrangement of thiocyanate 8 was employed. Subsequent functional group interconversions afforded the highly functionalized
Total synthesis of sphingofungin E (1) Is described. Overman rearrangement of an allylic trichloroacetimidate derived from diacetone-D-glucose generated tetra-substituted carbon with nitrogen, and subsequent Wittig olefination afforded the highly functionalized part in sphingofungin E (4) stereoselectively. Coupling reaction of 4 with the C-12 hydrophobic part, followed by further manipulation, completed the total synthesis.