Pd-Catalyzed Intramolecular Oxidative C–H Amination: Synthesis of Carbazoles
摘要:
A Pd-catalyzed oxidative C-H amination of N-Ts-2-arylanilines under ambient temperature using Ozone as an inexpensive, safe, and easy-to-handle oxidant has been developed. This process represents a green and practical method for the facile construction of carbazoles with a broad substrate scope and wide functional group tolerance.
Palladium-Catalyzed Oxidative Insertion of Carbon Monoxide to N-Sulfonyl-2-aminobiaryls through C–H Bond Activation: Access to Bioactive Phenanthridinone Derivatives in One Pot
摘要:
Palladium-catalyzed oxidative carbonylation of N-sulfonyl-2-aminobiaryls through C-H bond activation and C-C, C-N bond formation under TFA-free and milder conditions has been developed. The reaction tolerates a variety of substrates and provides biologically important phenanthrldlnone derivatives in yields up to 94%.
Transition-metal-free synthesis of aromatic amines via the reaction of benzynes with isocyanates
作者:Jeong Hoon Seo、Haye Min Ko
DOI:10.1016/j.tetlet.2018.01.022
日期:2018.2
unexpected reaction between benzynes and isocyanates to generate aromatic amines has been developed under transition-metal-free conditions. The in situ prepared anions formed through cleavage of the NC bond in isocyanates, reacted with aryne precursors to afford various aniline derivatives in moderate to excellent yield and tolerated various substituents on the o-silyl aryl triflate and the isocyanate.
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
Palladium-Catalyzed Oxidative CC Bond Cleavage Cyclization of Biaryl-2-amines with Alkenes Involving CH Olefination and Carboamination
作者:Yan-Yun Liu、Ren-Jie Song、Cui-Yan Wu、Lu-Bin Gong、Ming Hu、Zhi-Qiang Wang、Ye-Xiang Xie、Jin-Heng Li
DOI:10.1002/adsc.201100651
日期:2012.2
A new, general method for the synthesis of phenanthridines has been developed by palladium-catalyzedoxidative remote CH olefination–carboamination–CC bondcleavage tandem reaction. It is noteworthy that alkenes are used as the one-carbon resources for this tandem reaction.