Copper-Catalyzed Aliphatic C–H Amination with an Amidine Moiety
摘要:
A method for amination of aliphatic C-H bonds of N-alkylamidines is described that utilizes Cu(OAc)(2) as the catalyst in the presence of Phl(OAc)(2) and K3PO4. The resulting products, dihydroimidazoles and tetrahydropyrimidines, could be converted into the corresponding diamines by hydride reduction.
Copper-Catalyzed Aliphatic C–H Amination with an Amidine Moiety
摘要:
A method for amination of aliphatic C-H bonds of N-alkylamidines is described that utilizes Cu(OAc)(2) as the catalyst in the presence of Phl(OAc)(2) and K3PO4. The resulting products, dihydroimidazoles and tetrahydropyrimidines, could be converted into the corresponding diamines by hydride reduction.
Site‐Specific C(sp<sup>3</sup>)–H Aminations of Imidates and Amidines Enabled by Covalently Tethered Distonic Radical Anions
作者:Rong Zhao、Kang Fu、Yuanding Fang、Jia Zhou、Lei Shi
DOI:10.1002/anie.202008806
日期:2020.11.9
utilization of N‐centered radicals to synthesize nitrogen‐containing compounds has attracted considerable attention recently, due to their powerful reactivities and the concomitant construction of C−N bonds. However, the generation and control of N‐centered radicals remain particularly challenging. We report a tethering strategy using SOMO‐HOMO‐converted distonic radical anions for the site‐specific
Copper-catalyzed redox-neutral C–H amination with amidoximes
作者:Hui Chen、Shunsuke Chiba
DOI:10.1039/c3ob41871e
日期:——
CuI-catalyzed reactions of N-alkylamidoximes afforded dihydroimidazoles via sp3 CâH amination. On the other hand, the reactions of N-benzoylamidoximes resulted in sp2 CâH amination to form quinazolinones. The reaction mechanisms could be characterized as a redox-neutral radical pathway including a Cu(I)âCu(II) redox catalytic cycle.