“One-Pot” Tandem C−H Borylation/1,4-Conjugate Addition/Reduction Sequence
摘要:
A microwave-assisted, one-pot, iridium-catalyzed aromatic C-H borylation/rhodium-catalyzed 1,4-conjugate addition sequence provides a highly robust protocol suitable for high-throughput array synthesis. Selective formation of either beta-aryl-substituted ketones or the corresponding alcohols can be achieved in good overall yields by simple variation of the reaction conditions.
Chiral Bidentate Bis(N-Heterocyclic Carbene)-Based Palladium Complexes Bearing Carboxylate Ligands: Highly Effective Catalysts for the Enantioselective Conjugate Addition of Arylboronic Acids to Cyclic Enones
作者:Tao Zhang、Min Shi
DOI:10.1002/chem.200701982
日期:2008.4.18
Axiallychiral cis-chelated bidentate bis(N-heterocyclic carbene)-palladium(II) complexes with two weakly coordinating carboxylate ligands are effective catalysts for the asymmetric conjugate addition of arylboronicacids to cyclic enones, producing the corresponding adducts in moderate-to-high yields and with good-to-high enantioselectivities, in most cases under mild conditions.
Rhodium(I) Complexes Bearing Hydroxyl‐Functionalized 1,2,3‐Triazolylidenes and Their Catalytic Application
作者:Agustín A. de la Fuente‐Olvera、Franciso J. Ruiz‐Mendoza、José M. Vásquez‐Pérez、Myriam Meléndez‐Rodríguez、Alejandro Álvarez‐Hernández、Verónica Salazar‐Pereda、Daniel Mendoza‐Espinosa
DOI:10.1002/ejic.202200401
日期:2022.10.26
We report the synthesis and full characterization of a novel series rhodium(I) complexes (3 a–c) supported by hydroxyl-functionalized 1,2,3-triazolylidenes. Their application as catalysts in the 1,4-addition of boronic acid to 2-cyclohexenone and the hydrosilylation of terminal alkynes is described.
N-Heterocyclic carbene-rhodium(I) complexes derived from N-benzyl substituted proline have been successfully synthesized and were found to be efficient catalysts for the 1,4-conjugate addition of arylboronic acids to enones in neat water at 40 A degrees C. Under the optimal reaction conditions, all reactions gave the addition products in good to high yields.