Pd-Catalyzed Sequential CC and CN Bond Formations for the Synthesis of N-Heterocycles: Exploiting Protecting Group-Directed CH Activation under Modified Reaction Conditions
作者:Byung Seok Kim、Sun Young Lee、So Won Youn
DOI:10.1002/asia.201100024
日期:2011.8.1
addition reaction of N‐Ts‐2‐arylanilines with activated olefins has been achieved at ambient temperature under the newly defined reaction conditions. This process highlighted the directing effect of the N‐protecting group in CHactivation, displayed broad substrate scope with wide functional group compatibility; thus rendering a straightforward entry to a wide variety of N‐heterocycles such as d
An efficient method for the construction of dibenzo[b,d]azepines containing two distinct stereogenic elements in a highly diastereoselective fashion is described. The key of the [5 + 2] reaction is to form a π-allylpalladium species through sequential C–H activation and regiospecific migratory insertion of the diene. This observation contrasts with the behavior of 1,2-alkenes that generally underwent
Palladium-Catalyzed Regioselective C–H Acylation of Biaryl-2-amines
作者:Zhong-Jian Cai、Chao Yang、Shun-Yi Wang、Shun-Jun Ji
DOI:10.1021/acs.joc.5b00962
日期:2015.8.21
A palladium-catalyzed efficient C–H acylation reaction of biaryl-2-amines and aromatic aldehydes is developed. This dehydrogenativecross-coupling protocol could furnish monoacylation and diacylation products in moderate to good yields with a broad substrate scope and good regioselectivity.