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Treatment of halogeno acetals derived from deoxy-D-hexenopyranosides of erythro and threo configuration with tributyltin hydride with a radical initiator gave fused pyranofuranosides. This allowed the completely stereo and regio-specific introduction of a functionalized carbon chain at the C-2 or C-3 position of some carbohydrate templates.
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Moufid et al. (1992) studied this question.
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