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FeCl3 mediated cycloaddition of o-hydroxybenzyl alcohols and olefins.a a Reaction conditions: 1 (1.0 mmol), 2 (2 equiv), FeCl3 (10 mol % with respect to diol) and 0.5 M with respect to diol; diastereomeric ratio determined by 1H NMR. b Diol (0.5 mmol, 1 equiv), p-methoxystyrene (2 equiv), FeCl3 (20 mol % with respect to diol). Detailed experimental conditions are provided in the Supporting Information.
