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
Visible-Light-Induced Decarboxylative Cyclization/Hydrogenation Cascade Reaction to Access Phenanthridin-6-yl(aryl)methanol by an Electron Donor–Acceptor Complex
作者:Wei Shi、Fang Ma、Pinhua Li、Lei Wang、Tao Miao
DOI:10.1021/acs.joc.0c01916
日期:2020.11.6
visible-light-induced decarboxylative cyclization/hydrogenation cascade reaction of α-oxocarboxylic acids and 2-isocyanobiaryls has been developed. Without the need of any external photosensitizer, oxidant, and reductant, this method offers a mild and green approach for the synthesis of diverse alcohols in moderate to good yields. A mechanism indicated that an electrondonor–acceptor complex-driven decarboxylation,
Synthesis of 6-acyl phenanthridines by oxidative radical decarboxylation–cyclization of α-oxocarboxylates and isocyanides
作者:Jie Liu、Chao Fan、Hongyu Yin、Chu Qin、Guoting Zhang、Xu Zhang、Hong Yi、Aiwen Lei
DOI:10.1039/c3cc49026b
日期:——
A silver catalysed synthesis of 6-acyl phenanthridines by oxidative radical decarboxylation–cyclization of α-oxocarboxylates and isocyanides was developed.
一种通过氧化性自由基脱羧-环化反应合成6-酰基菲啰啉的银催化方法已经开发出来。
Preparation of phenanthrenes from ortho-amino-biphenyls and alkynes via base-promoted homolytic aromatic substitution
作者:Marcel Hartmann、Constantin Gabriel Daniliuc、Armido Studer
DOI:10.1039/c4cc10063h
日期:——
transition-metal-free phenanthrene synthesis starting from readily accessible ortho-amino-biaryls is presented. The biarylamines are in situ transformed into the corresponding diazonium salts which upon single electron reduction give the corresponding aryl radicals. Addition to an alkyne and subsequent base promoted homolyticaromaticsubstitution (BHAS) provide phenanthrenes in moderate to good yields
6-Trifluoromethyl-Phenanthridines through Radical Trifluoromethylation of Isonitriles
作者:Bo Zhang、Christian Mück-Lichtenfeld、Constantin Gabriel Daniliuc、Armido Studer
DOI:10.1002/anie.201306082
日期:2013.10.4
A radical approach toward 6‐perfluoroalkylphenanthridines employs the Togni reagent or derivatives thereof as radical precursors and occurs in the absence of a transition metal. Bu4NI is applied as radical initiator and phenanthridines are formed in good to excellent yields. In contrast to the currently intensively investigated trifluoromethylation of arenes, the arene core is formed during the trifluoromethylation