Tubercidin. Its Conversion into 5′-Deoxytubercidin

概要

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Tubercidin (I) was converted into 5′-deoxytubercidin (IV). Mesylation of 2′,3′-O-isopropylidenetubercidin (IX) afforded-2′,3′-O-isopropylidene-5′-O-mesyltubercidin (XVIII), which in situ was treated with benzoyl chloride. The product, N6,N6-dibenzoyl-2′,3′-O-isopropylidene-5′-O-mesyltubercidin (XXII), was converted into N6,N6-dibenzoyl-5′-deoxy-5′-iodo-2′,3′-O-isopropylidenetubercidin (XXIV). Catalytic hydrogenation of XXIV afforded N6-benzoyl-5′-deoxy-2′,3′-O-isopropylidenetubercidin (XXVII). 5′-Deoxytubercidin (IV) was obtained on debenzoylation and deacetonation of XXVII.
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