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
Synthesis of 6-Substituted Phenanthridine Derivatives by Palladium-Catalysed Domino Suzuki-Miyaura/Aza-Michael Reactions
作者:Xiaobo Bao、Wei Yao、Qihua Zhu、Yungen Xu
DOI:10.1002/ejoc.201402913
日期:2014.11
An efficient method for the synthesis of 6-substitutedphenanthridinederivatives has been developed through a one-pot process involving a sequence of palladium-catalysedSuzuki–Miyaurareaction followed by intramolecular aza-Michael addition. This method is applicable to the synthesis of a wide range of substituted phenanthridines from simple substrates.
Oxidative Cross-Coupling of <i>N</i>-(2‘-Phenylphenyl)benzene- sulfonamides or Benzoic and Naphthoic Acids with Alkenes Using a Palladium−Copper Catalyst System under Air
N-(2'-Phenylphenyl)benzenesulfonamides react with acrylate esters accompanied via cleavage of the C-H bond at their 2'-position in the presence of a catalyst system of Pd(OAc)(2) and Cu(OAc)(2) and a base under air to produce 5,6-dihydro-5-(benzenesulfonyl)phenanthridine-6-acetate derivatives in high yields. The reactions of benzoic acid with butyl acrylate and styrene can also give 3-[(butoxycarbonyl)methyl]phthalide and 3-phenylisocoumarin, respectively.