Abstract

Abstract The reaction of α-anomers of methyl 2,3-anhydro-D-ribo- and D-allo-furanosides with allylic Grignard reagents predominantly gave the corresponding 2-deoxy-2-C-alkenylfuranosides. In contrast, their β-anomers selectively gave 3-C-alkenyl derivatives. Preparation of a synthon of the C-4∼C-9 fragment common to various 16-member macrolide antibiotics is also described.

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