A new protocol to synthesize 1,2-dihydrocyclobuta[b]quinoline derivatives from isocyanophenyl-substituted methylenecyclopropanes via a formal insertion of isocyanide carbon into a C−C bond has been developed. The reaction proceeds smoothly in the presence of silver carbonate (5 mol%) upon heating in a highly atom economic manner and exhibits broad substrate scope, giving the desired products in moderate to excellent yields. Furthermore, several transformations of the obtained products have been also demonstrated.

中文翻译：

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由异氰基苯基取代的亚甲基环丙烷合成1,2-二氢环丁[b]喹啉衍生物

已经开发了一种新方法，可以通过将异氰酸酯碳正式插入CC键中，由异氰基苯基取代的亚甲基环丙烷合成1,2-二氢环丁[b]喹啉衍生物。当以高度原子经济的方式加热时，该反应在碳酸银（5mol％）的存在下顺利进行，并显示出广泛的底物范围，以中等至优异的产率得到所需产物。此外，还证明了所得产物的几种转化。