Organotransition metal modified sugars: Part 27. Stereoselective radical spiro-cycloaddition reactions of Fischer carbene complexes

Carbohydrate-functionalised heterocyclic spiro compounds of potential biological relevance are accessible using an organometallic route based on the radical addition of 1,1-dichlorovinylcyclopropane to sugar-derived exo-methylene chromium oxacyclopentylidenes.