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A Sc(OTf)3‐catalyzed tandem (3 + 3)‐annulation/lactonization of donor‐acceptor cyclopropane 1,1‐dieters with salicylaldehyde nitrones has been reported, affording a wide range of tetrahydrochromeno[4,3‐c][1,2]oxazin‐5(1H)‐ones in moderate yields with excellent diastereoselectivities. Besides, the gram‐scale reaction has also been explored to demonstrate the utility of this protocol. Moreover, the...
The recently discovered plastic/ductile inorganic thermoelectric (TE) materials open a new avenue for the fabrication of high‐efficiently flexible TE devices, which can utilize the small temperature difference between human body and environment to generate electricity. However, the maximum power factor (PF) of current plastic/ductile TE materials is usually around or less than 10 µW cm−1 K−2, much...