Aerobic oxidative CH functionalizations of weakly coordinating benzoic acids have been accomplished with versatile ruthenium(II) biscarboxylates under ambient oxygen or air. Mechanistic studies identified the key factors controlling the elementary step of the oxidation of the ruthenium(0) complex.
Ruthenium(II)-Catalyzed Synthesis of Pyrrole- and Indole-Fused Isocoumarins by C−H Bond Activation in DMF and Water
作者:Keisham S. Singh、Sneha G. Sawant、Pierre H. Dixneuf
DOI:10.1002/cctc.201501261
日期:2016.3.18
Pyrrole‐ and indole‐fused isocoumarins constitute important structural units in natural products and pharmacophores, although the direct and selective bifunctionalization of pyrrole and indole remain a challenge. Herein, we report a one‐pot synthesis of pyrrole‐ and indole‐fused isocoumarins from simple 1‐methylpyrrole‐2‐carboxylic acid and 1‐methylindole‐3‐carboxylic acid by annulation with alkynes
Regioselective synthesis of pyrrole and indole-fused isocoumarins catalysed by N
$$^\wedge $$
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O chelate ruthenium(II) complex
作者:Keisham S Singh、Sneha G Sawant、Werner Kaminsky
DOI:10.1007/s12039-018-1519-z
日期:2018.9
synthesis viaannulations of N-heterocyclic carboxylic acids and alkynes with N\(^\wedge \)O chelate ruthenium(II) complex, [RuCl(\(\hbox PySO}_3})(p\)-cymene)] (\(\hbox PySO}_3}\) = 2-pyridinesulfonate) in the presence of Cu(OAc)\(_2}\hbox H}_2}\)O. The reaction proceeds efficiently in DMF but can also be performed in other solvents such as dichloroethane, \(^t}\)AmOH, and water. The annulations