Synthesis of DPPP- and DPPPEN-Type Bidentate Ligands by Ring-Opening Diphosphination of Methylene- and Vinylcyclopropanes under Visible-Light-Promoted Photoredox Catalysis
作者:Yugo Kato、Nobutaka Otomura、Koji Hirano、Masahiro Miura
DOI:10.1021/acs.joc.0c00417
日期:2020.5.1
A ring-opening diphosphination of methylene- and vinylcyclopropanes with tetraaryldiphosphines (Ar2P-PAr2) has been developed to afford the corresponding 1,3-diphenylphosphinopropane- and 1,3-diphenylphosphinopentane-type bidentate ligands, respectively. The reaction proceeds under bromine cation-initiated, visible-light-promoted photoredox catalysis at ambient temperature. Owing to the ready availability
已经开发了用四芳基二膦(Ar 2 P-PAr 2)对亚甲基和乙烯基环丙烷进行开环二磷酸化,以分别提供相应的1,3-二苯基膦基丙烷和1,3-二苯基膦基戊烷型双齿配体。反应在室温下在溴阳离子引发的可见光促进的光氧化还原催化下进行。由于容易获得官能化的二膦,还可以轻松制备电子上多样的MeO和CF3取代的二齿配体。