Palladium-Catalyzed Benzylic C–H Arylation of Azaarylmethylamines
摘要:
A direct C-H functionalization approach to produce aryl(azaaryl)methylamines from azaarylmethylamines without directing groups is described. Under conditions where the azaarylmethylamines' C-H is reversibly deprotonated, a Pd(OAc)(2)/NIXANTPHOS-based catalyst couples the resulting carbanions with various aryl halides to provide aryl-(azaaryl)methylamines This umpolung strategy directly provides tertiary amines without protecting or activating groups.
Arylation of Azaarylmethylamines with Aryl Chlorides and a NiBr
<sub>2</sub>
/NIXANTPHOS‐based Catalyst
作者:Gui Gao、Yue Fu、Minyan Li、Bo Wang、Bing Zheng、Shicong Hou、Patrick J. Walsh
DOI:10.1002/adsc.201700438
日期:2017.8.17
A nickel‐catalyzed coupling of azaarylmethylamines with aryl chlorides has been achieved. NIXANTPHOS together with low cost NiBr2 was successfully developed and optimized to exhibit high reactivity at 2.5 mol % loading. Under optimized reaction conditions, aryl(azaaryl)methylamine products were afforded in good to excellent yields (22 examples, up to 98% yield).