Ag(I)-catalyzed synthesis of diazo-trisubstituted furans starting from diazo-cumulated allenyl ketones has been investigated. The Rh2(OAc)4-catalyzed reaction of the diazo 2,3,5-trisubstituted furans provided penta-substituted aromatics via cascade intermolecular cyclopropanation/rearrangement/isomerization. The cyclopropanation on the furan ring/rearrangement of cyclopropane moiety has been reported. A reasonable mechanism is proposed.

中文翻译：

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重氮2,3,5-三取代呋喃的合成及铑（II）介导的级联环丙烷化/重排/异构化：五取代芳族化合物的构建。

从重氮累积的烯基酮开始，已研究了Ag（I）催化的重氮三取代呋喃的合成。重氮2,3,5-三取代的呋喃的Rh2（OAc）4-催化的反应通过级联分子间环丙烷化/重排/异构化提供了五取代的芳族化合物。已经报道了呋喃环上的环丙烷化/环丙烷部分的重排。提出了合理的机制。