halogen bonding (XB) for the generation of aryl radicals from aryl halides under blue light irradiation and applied it in radical generation/1,5-hydrogen-atom transfer/radical cyclization cascade reactions for the synthesis of oxindoles and isoindolinones. On the basis of experimental studies, we propose that DBU can serve as a suitable XB acceptor with aryl halides for the formation of a photoactive
Photocatalytic Hydrogen Atom Transfer-Induced Arbuzov-Type α-C(sp<sup>3</sup>)–H Phosphonylation of Aliphatic Amines
作者:Zhexuan Lei、Weigang Zhang、Jie Wu
DOI:10.1021/acscatal.3c04621
日期:2023.12.15
applications. Herein, we report photocatalytic HAT-induced α-C(sp3)–H phosphonylation of aliphatic amines, providing rapid access to structurally diverse α-aminophosphonates from abundant amines. Leveraging intramolecular HAT, radicalpolarcrossover, and an Arbuzov-type phosphonylation cascade, the challenges associated with HAT-induced C(sp3)–H to C(sp3)–P transformation were overcome. This protocol features
A direct amidation of carboxylicacids with tertiary amines could be carried out in the presence of the Ph3P–I2 activator. With an appropriate reagent addition sequence, a range of carboxylicacids including aliphatic, allylic, and aromatic acids could be converted into their corresponding tertiary amides under mild conditions without requirement of metal catalysis.
A base-promoted cascade reaction for the regiospecificsynthesis of substituted 3-hydroxyisoindolinones under transition-metal-free conditions is developed. The base-mediated C–C bond coupling and N-α-sp3C–H bond hydroxylation are involved in this procedure, which features high regioselectivity, efficiency, and environmental friendliness. Various substituted 3-hydroxyisoindolinones, including some