Facile synthesis of 6a-carba-β-d-fructopyranose through an RCM approach

A new synthetic approach toward 6a-carba-β-d-fructopyranose, a non-nutritive sweetener related to topiramate, is described. This scheme uses 2-C-hydroxymethyl-l-erythrose acetonide as starting material and efficiently delivers the target compound applying an RCM protocol for the construction of the carbocycle ring.