Site-Selective sp C-H Cyanation of Allenes via Copper-Catalyzed Radical Relay.

Compared with the extensively reported hydrogen atom transfer (HAT) at sp C-H, abstraction of hydrogen atoms at the sp carbon is extremely rare. Here, we communicate the site-selective cyanation of the sp C-H bond of allenes using the strategy of copper-catalyzed radical relay. The reactions afford various allenyl nitriles directly from simple allenes with a broad substrate scope and a remarkable functional group compatibility under mild conditions.

Recent progress in self-powered multifunctional e-skin for advanced applications.

Electronic skin (e-skin), new generation of flexible wearable electronic devices, has characteristics including flexibility, thinness, biocompatibility with broad application prospects, and a crucial place in future wearable electronics. With the increasing demand for wearable sensor systems, the realization of multifunctional e-skin with low power consumption or even autonomous energy is urgently needed. The latest progress of multifunctional self-powered e-skin for applications in physiological health, human-machine interaction (HMI), virtual reality (VR), and artificial intelligence (AI) is presented here.