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• W2031303793 abstract "Abstract Ph 3 PAuNTf 2 (≈1 mol‐%) catalyzes the selective cycloisomerization of substituted aryl propargyl ethers into 2 H ‐chromenes in excellent yields. Benzofuran byproducts are formed only in the case of electron‐deficient arenes, in up to 7 % relative yield. The Ph 3 PAuNTf 2 ‐catalyzed cyclization of aryl propargyl ethers was applied as a key step to the concise synthesis of the naturally occurring benzopyrans seselin, xanthyletin, precocenes I and II, 8‐(3′,3′‐dimethylallyl)wenteria chromene, and 2,2‐dimethyl‐8‐prenylchromene‐6‐propenoic acid." @default.
• W2031303793 created "2016-06-24" @default.
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• W2031303793 date "2011-03-10" @default.
• W2031303793 modified "2023-10-10" @default.
• W2031303793 title "Ph₃PAuNTf₂ as a Superior Catalyst for the Selective Synthesis of 2<i>H</i>‐Chromenes: Application to the Concise Synthesis of Benzopyran Natural Products" @default.
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• W2031303793 doi "https://doi.org/10.1002/ejoc.201001674" @default.
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