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All articles of this category The combination of the oxidative intramolecular [4+2]cycloaddition of o -acylphenol derivatives 10a,b and 16 having the ω-phenylthioethynyl group in the acyl chain and the Pummerer-type reaction of the cyclization products afforded the peri -hydroxy dihydroquinones 9a,b and 18 in good overall yields. intramolecular [4+2]cycloaddition - Pummerer-type reaction - peri -hydroxy dihydroquinone - phenylthioacetylene
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Akai et al. (1997) studied this question.
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