A Highly Active Catalyst for Pd-Catalyzed Amination Reactions: Cross-Coupling Reactions Using Aryl Mesylates and the Highly Selective Monoarylation of Primary Amines Using Aryl Chlorides
作者:Brett P. Fors、Donald A. Watson、Mark R. Biscoe、Stephen L. Buchwald
DOI:10.1021/ja8055358
日期:2008.10.15
reactivity for C-N cross-coupling reactions is reported. This catalyst system enables the use of arylmesylates as a coupling partner in C-N bond-forming reactions. Additionally, the use of BrettPhos permits the highly selective monoarylation of an array of primary aliphatic amines and anilines at low catalyst loadings and with fast reaction times, including the first monoarylation of methylamine. Lastly
Development of an Air-Stable Nickel Precatalyst for the Amination of Aryl Chlorides, Sulfamates, Mesylates, and Triflates
作者:Nathaniel H. Park、Georgiy Teverovskiy、Stephen L. Buchwald
DOI:10.1021/ol403209k
日期:2014.1.3
A new air-stablenickelprecatalyst for C–Ncross-coupling is reported. The developed catalyst system displays a greatly improved substrate scope for C–N bond formation to include both a wide range of aryl and heteroaryl electrophiles and aryl, heteroaryl, and alkylamines. The catalyst system is also compatible with a weak base, allowing the amination of substrates containing base-sensitive functional
Exploiting Aryl Mesylates and Tosylates in Catalytic Mono-α-arylation of Aryl- and Heteroarylketones
作者:Wai Chung Fu、Chau Ming So、On Ying Yuen、Irene Toi Chuk Lee、Fuk Yee Kwong
DOI:10.1021/acs.orglett.6b00643
日期:2016.4.15
The first general palladium catalyst for the catalytic mono-α-arylation of aryl- and heteroarylketones with arylmesylates and tosylates is described. The newly developed indolyl-derived phosphine ligand L7 has been identified to promote this reaction efficiently. The key to success is attributed to the enhanced steric congestion of the catalyst and effective oxidative addition of the C(Ar)–OMs bond
§ These authors contributed equally Abstract A method for the nickel-catalyzed coupling of alkynyl carboxylates or acids with aryltosylates and mesylates is described. Electronically varied carboxylates and aryl electrophiles participate in these transformations to afford the desired diarylalkyne products. In general, electrophiles bearing an extended π-system lead to products in higher yields than