Aryl nitrile oxide cycloaddition reactions in the presence of pinacol boronic acid ester.
BEILSTEIN JOURNAL OF ORGANIC CHEMISTRY(2012)
摘要
An aryl substrate with dual functionality consisting of a nitrile oxide and a pinacolyl boronate ester was prepared by mild hypervalent iodine oxidation (diacetoxyiodobenzene) of the corresponding aldoxime, without decomposition of the boronate functionality. The nitrile oxide was trapped in situ with a variety of dipolarophiles to yield aryl isoxazolines with the boronate ester function intact and available for subsequent reaction.
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关键词
dipolar cycloaddition,heterocycle,nitrile oxide,hypervalent iodine oxidation,pinacol boronic acid esters
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