Tuesday, July 31, 2012
Sunday, July 29, 2012
Thursday, July 26, 2012
Wednesday, July 25, 2012
Microwave-assisted palladium mediated decarbonylation reaction: synthesis of eulatachromene
Microwave-assisted decarbonylation reactions were investigated using a palladium catalyst. A large number of aldehydes can be decarbonylated efficiently with lower catalyst loadings and under shorter reaction times compared to conventional heating. A successful decarbonylation led to the synthesis of natural product eulatachromene in three steps starting from easily available materials.
Highly regioselective synthesis of aryl chalcogenides through C–H functionalization of arenes
We report here the regioselective synthesis of aryl chalcogenides through the iridium-catalyzedmeta C–H borylation followed by copper-catalyzed C–S coupling reaction with chalcogenide sources in one pot, giving the 3,5-disubstituted aryl chalcogenides with high regioselectivity and good yields.
An efficient copper-catalyzed formation of highly substituted pyrazoles using molecular oxygen as the oxidant
An efficient Cu-catalyzed formation of tetra-substituted pyrazoles is reported. In this atom economic process, readily available enamines and nitriles are reacted by C–C and N–N bond formation. Oxygen has been successfully used as the oxidant, which has important economic and environmental advantages. A broad scope of enamines and nitriles can be utilized in this process.
TBHP/I2-promoted oxidative coupling of acetophenones with amines at room temperature under metal-free and solvent-free conditions for the synthesis of α-ketoamides
A novel and efficient TBHP/I2-promoted oxidative coupling reaction of acetophenones with amines for the synthesis of α-ketoamides has been developed. The reactions proceeded smoothly at room temperature under metal-free and solvent-free conditions and generated the corresponding products in good yields.
A simple and facile Heck-type arylation of alkenes with diaryliodonium salts using magnetically recoverable Pd-catalyst
The Heck-type arylation of alkenes was achieved in aqueous polyethylene glycol using a magnetically recoverable heterogenized palladium catalyst employing diaryliodonium salts under ambient conditions. The benign reaction medium and the stability of the catalyst are the salient features of this simple and facile protocol.
Tuesday, July 24, 2012
Monday, July 23, 2012
Saturday, July 21, 2012
Copper-Catalyzed Aerobic Aliphatic C–H Oxygenation Directed by an Amidine Moiety
DOI: 10.1021/ja305833a
Continuous-Flow Synthesis of Monoarylated Acetaldehydes Using Aryldiazonium Salts
DOI: 10.1021/ja305660a
Friday, July 20, 2012
Thursday, July 19, 2012
Catalytic Aerobic Synthesis of Aromatic Ethers from Non-Aromatic Precursors
DOI: 10.1002/anie.201200698
Tuesday, July 17, 2012
Palladium-Catalyzed Direct Arylation of N-Heteroarenes with Arylsulfonyl Hydrazides
DOI: 10.1002/chem.201201450