Pd(0)-catalyzed intramolecular C-H alkenylation was achieved with excellent yields and: enantioselectivity for the construction of planar chiral ferrocenes. It is compatible with a broad range of substrates and various functional groups. Notably, the enantioselective and diastereoselective, synthesis of planar chiral ferrocenes was realized by cascade C-H arylation and alkenylation reaction for the first time. Additionally, the product was easily converted into a N,O-bidentate ligand, showing promising chiral induction in asymmetric alkynylation of 1-naphthaldehyde.
Microwave-Assisted Copper-Powder-Catalyzed Coupling and Cyclization of β-Bromo-α,β-unsaturated Carboxylic Acids with 1,3-Diketones Leading to 2H-Pyran-2-ones
作者:Chan Cho、Son Ho、Ho-Sang Sohn
DOI:10.1055/s-0034-1379103
日期:——
Abstract β-Bromo-α,β-unsaturatedcarboxylicacids were coupled and cyclized with 1,3-diketones by microwave irradiation in the presence of a catalytic amount of copper powder and base to give the corresponding 2H-pyran-2-ones in good to high yields. β-Bromo-α,β-unsaturatedcarboxylicacids were coupled and cyclized with 1,3-diketones by microwave irradiation in the presence of a catalytic amount of
Palladium-Catalyzed Carbonylative Cyclization of β-Bromo-α,β-unsaturated Carboxylic Acids Leading to Maleic Anhydrides
作者:Chan Cho、Yeon Bae
DOI:10.1055/s-0033-1339309
日期:——
β-Bromo-α,β-unsaturatedcarboxylicacids are carbonylativelycyclized under carbon monoxide pressure in acetic acid in the presence of a catalytic amount of a palladium catalyst along with a base to give the corresponding maleic anhydrides in high yields.
Microwave-Assisted Copper-Powder-Catalyzed Synthesis of Pyrimidinones from β-Bromo α,β-Unsaturated Carboxylic Acids and Amidines
作者:Chan Cho、Son Ho
DOI:10.1055/s-0033-1340283
日期:——
β-Bromo α,β-unsaturatedcarboxylic acids were coupled and cyclized with amidine hydrochlorides by microwave irradiation in the presence of catalytic amounts of copper powder and a base to give the corresponding pyrimidinones in high yields.
Palladium-catalyzed three-component cyclization of 2-bromocyclohex-1-enecarboxylic acids with carbon monoxide and arylhydrazines leading to 2-anilinohydroisoindoline-1,3-diones
Palladium-catalyzed carbonylative cyclization of β-bromo-α,β-unsaturated carboxylic acids with 2,2-dimethylhydrazine leading to 1-(dimethylamino)-1<i>H</i>
-pyrrole-2,5-diones