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Organotransition Metal Modified Sugars. Part 9. Diastereoselective Synthesis of 2,6-Imino-D-allonates from Chromium Carbene Iminosugars.-Sugar lactams (III) obtained from D-ribono-lactones (I) are converted into the chromium complexes (V). These are subjected to photolysis, yielding the D-allonates (VII) diastereoselectively upon nucleophilic addition of methanol. - (KLUMPE, M.; DOETZ, K. H.; Tetrahedron Lett. 39 (1998) 22, 3683-3684; Inst. Org. Chem. Biochem., Rhein.

Organotransition Metal Modified Carbohydrates. Part 6. Metal Modified Carbohydrates: Syntheses of Furanosylidene Complexes and Their Aza Analogues. -The novel transition metal stabilized complexes (III), (V), and (VIII) are stable at room temperature and can be handled briefly in air. As Fischer-type carbene complexes they are promising agents for the elaboration of more complex C-glycosidic structures. -(DOETZ, K. H.; HAASE, W.-C.; KLUMPE, M.; NIEGER, M.; Chem.

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