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
Denitrogenative Suzuki and carbonylative Suzuki coupling reactions of benzotriazoles with boronic acids
作者:Yuanhao Wang、Yunfei Wu、Yuanhe Li、Yefeng Tang
DOI:10.1039/c7sc00367f
日期:——
The unprecedented palladium-catalyzed denitrogenative Suzuki and carbonylative Suzukicoupling reactions of benzotriazoles with boronic acids have been realized, which afforded structurally diverse ortho-amino-substituted biaryl and biaryl ketone derivatives. Key to...
Palladium‐Catalyzed and Hybrid Acids‐Assisted Synthesis of [60]Fulleroazepines in One Pot under Mild Conditions: Annulation of
<i>N</i>
‐Sulfonyl‐2‐aminobiaryls with [60]Fullerene through Sequential C‐H Bond Activation, C‐C and C‐N Bond Formation
An extraordinarily efficient hybrid acids‐assisted, palladium‐catalyzed and chelating‐group‐assisted CH bond activation of N‐sulfonyl‐2‐aminobiaryls and their annulations with [60]fullerene via sequential CC and CN bond formation at room temperature to afford [60]fulleroazepines is demonstrated. The formation of [60]fulleroazepines is highly regioselective and tolerant to both electron‐withdrawing
Electrochemical Synthesis of Carbazoles by Dehydrogenative Coupling Reaction
作者:Anton Kehl、Niclas Schupp、Valentina M. Breising、Dieter Schollmeyer、Siegfried R. Waldvogel
DOI:10.1002/chem.202003430
日期:2020.12.4
remarkably low supporting electrolyte concentration, inexpensive electrode materials, and a straightforward precursor synthesis enabling a novel access to N‐protected carbazoles by anodic N,C bond formation using directly generated amidyl radicals is reported. Scalability of the reaction is demonstrated and an easy deblocking of the benzoyl protecting group is presented.
Highly Stereoselective Synthesis of Imine‐Containing Dibenzo[
<i>b</i>
,
<i>d</i>
]azepines by a Palladium(II)‐Catalyzed [5+2] Oxidative Annulation of
<i>o</i>
‐Arylanilines with Alkynes
A novel palladium(II)‐catalyzed [5+2] oxidativeannulation of readily available o‐arylanilines with alkynes has been developed for building a seven‐membered N‐heterocyclic architecture containing a biaryl linkage. This method is applicable to a wide range of unprotected o‐arylanilines and internal alkynes, and results in the chemoselective preparation of imine‐containingdibenzo[b,d]azepines in high