Journal
ORGANIC LETTERS
Volume 12, Issue 19, Pages 4332-4334Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ol101792a
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- MEXT
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o-(Silylmethyl)benzyl carbonates reacted with various electron-deficient ketones in the presence of a palladium catalyst, affording the [4 + 2] cycloaddition products, isochromanes, in high yields. The palladium-catalyzed cycloaddition is equivalent to the oxo-Diels Alder reaction of o-xylylene with ketones. The regioselectivities were extraordinarily affected by the structures of the o-xylylene precursors and ketones. The unusual regiochemistry may support two competitive reaction pathways in the catalytic reaction.
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