C(sp<sup>3</sup>)–H bond functionalization with styrenes <i>via</i> hydrogen-atom transfer to an aqueous hydroxyl radical under photocatalysis
作者:Shogo Mori、Susumu Saito
DOI:10.1039/d1gc00753j
日期:——
of α-C–H bonds of acetonitrile and acetone to styrenes was enabled via the hydrogen-atom transfer from relatively acidic and water-miscible C(sp3)–H bonds to an aqueous hydroxyl radical generated cleanly and iteratively by the oxidation of water under silver-nanoparticle-loaded titania photocatalysis without using stoichiometric oxidation agents.
Remote C−H Pyridylation of Hydroxamates through Direct Photoexcitation of
<i>O</i>
‐Aryl Oxime Pyridinium Intermediates
作者:Byeongseok Kweon、Changha Kim、Seonyul Kim、Sungwoo Hong
DOI:10.1002/anie.202112364
日期:2021.12.13
designing a new class of photon-absorbing O-aryl oxime pyridinium salts generated in situ from the corresponding pyridines and hydroxamates. This method involves photolytic N−O bond cleavage through the photoexcitation of oxime pyridiniumintermediates to generate iminyl radicals, which enable the installation of pyridyl rings at the γ-CN position in complex settings under mild and metal-free conditions.