Nickel Photocatalyzed Reductive 1,4-Dicarbofunctionalization of 1,3-Enynes with <i>N</i>-Methylamines and Organohalides Enabled by Site-Selective C(sp<sup>3</sup>)–H Functionalization
作者:Chaozhihui Cheng、Gui-Fen Lv、Shuang Wu、Yang Li、Jin-Heng Li
DOI:10.1021/acs.orglett.3c01103
日期:2023.6.16
catalysis for 1,4-dicarbofunctionalization of 1,3-enynes with tertiary N-methylamines and organohalides to produce tetrasubstituted allenes is presented. This method enables the generation of the aminoalkyl C(sp3)-centered radicals by site selective cleavage of the N-methyl C(sp3)–H bonds in tertiary N-methylamines and is extended to alkyl bromides as the electrophilic terminating regents. Mechanistic
提出了一种用于 1,3-烯炔与叔N-甲胺和有机卤化物的 1,4-二碳官能化以产生四取代丙二烯的协同镍和光氧化还原还原催化。该方法能够通过对 N-甲基叔胺中的N-甲基C(sp 3 )–H 键进行位点选择性裂解,生成以 C (sp 3 ) 为中心的氨基烷基自由基,并将其扩展为烷基溴作为亲电子终止试剂。机理研究表明该反应涉及自由基过程和Ni 0 /Ni I /Ni III催化循环。