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.
A Copper-Catalyzed Petasis Reaction for the Synthesis of Tertiary Amines and Amino Esters
作者:Robin Frauenlob、Carlos García、Gary A. Bradshaw、Helen M. Burke、Enda Bergin
DOI:10.1021/jo3003503
日期:2012.5.4
We have developed a copper-catalyzed process for the coupling of aldehydes, amines, and boronic acids. This allows greater reactivity with simple aryl boronic acids and allows coupling reactions to proceed that previously failed. Initial mechanistic studies support a process involving transmetalation from boron to copper.