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The tributyltin hydride + AIBN mediated free radical cyclization of oxime ethers tethered dithioacetals 6 and 12, obtained from D-ribose or D-glucose, respectively, is reported. The desired carbocycles 7, 8 and 14 have been obtained in good yield and moderate diastereoselectivity. These products are new mannostatin A analogues.
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Marco‐Contelles et al. (1995) studied this question.
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