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• W2007047219 abstract "Treatment of D-glucose-derived alkene 4 with cyclopentadiene in the presence of a Lewis acid results in the formation of cycloaddition products 8-11. Evidence is presented to show that these 1,6-anhydro sugar-cyclopentadiene adducts do not arise from rearrangement of 4 to isolevoglucosenone (5) followed by cycloaddition but are the result of Lewis acid-catalyzed rearrangement of alkene 4 to acyclic dienophile 12 followed by addition of cyclopentadiene. Major cycloadduct 8 has been utilized as a source of the enantiomerically pure carbocycles 14-25 by manipulation of the alkene and ketone functions and cleavage of the 1,6-anhydro bridge. In the absence of diene, alkene 4 undergoes rearrangement to enone 5 in 32% yield. Reaction of 5 with several dienes results only in the formation of bottom-face adducts 10,11, 28, and 29, and conjugate addition of either HN(3) or Me(3)COOH is found to be completely stereoselective to afford 30 and 31, respectively. Subsequent manipulation of azide 30 leads to precursors of several naturally occurring 2-amino-2,3-dideoxy sugars." @default.
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• W2007047219 date "1996-01-01" @default.
• W2007047219 modified "2023-10-16" @default.
• W2007047219 title "Cycloaddition of Cyclopentadiene to 3-Deoxy-1,2:5,6-di-<i>O</i>-isopropylidene-α-<scp>d</scp>-<i>erythro</i>-hex-3-enofuranose. Synthesis and Representative Chemistry of 1,6-Anhydro-2,3-dideoxy-β-<scp>d</scp>-<i>glycero</i>-hex-2-enopyran-4-ulose (“Isolevoglucosenone”)" @default.
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• W2007047219 doi "https://doi.org/10.1021/jo960032y" @default.
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