A highly efficient method for the construction of 3a,6a-dihydrofuro[2,3-b]furan derivatives has been developed via a novel bicyclization, which is very valuable for the synthesis of fused furofuran compounds since it is time-saving and catalyst-free. Based on the bicyclization, a coupled domino strategy has been developed to directly construct 3a,6a-dihydrofuro[2,3-b]furan derivatives from methyl ketones.

中文翻译：

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通过新型双环化高效合成3a，6a-二氢呋喃[2,3- b ]呋喃

通过新型的双环化，已经开发出了一种高效的3a，6a-二氢呋喃[2,3- b ]呋喃衍生物的构建方法，该方法对于合成熔融呋喃呋喃化合物非常节省时间，并且可以催化催化剂。自由。基于双环化，已开发了一种耦合多米诺骨牌策略，可直接从甲基酮构建3a，6a-二氢呋喃[2,3- b ]呋喃衍生物。