A simple conversion of 2-methoxynaphthoquinones to 2, 3, 4, 5-tetrahydronaphtho [1, 2-b] furan-4, 5-diones. Application to the synthesis of (.+-.)-trypethelones

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~%

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~%

~91%

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~89%

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~88%

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~97%

~97%

~99%

~81%

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