A Planar-Chiral Phosphino(alkenyl)ferrocene for Suzuki-Miyaura C-C Coupling Reactions
作者:Dieter Schaarschmidt、Martin Grumbt、Alexander Hildebrandt、Heinrich Lang
DOI:10.1002/ejoc.201402861
日期:2014.10
applied in the presence of palladium in Suzuki–Miyauracouplings for the synthesis of sterically congested biaryls. The catalytic activity arises from homogeneous palladium phosphine complexes, of which the potential pre-catalyst [Pd(4)2Cl2] was characterized structurally. The catalytic system is excellently suited for the synthesis of tri-ortho-substituted biaryls under mild conditions (0.1 mol-%, 50–100
Evaluation of the Transferability of the “Flexible Steric Bulk” Concept from N‐Heterocyclic Carbenes to Planar‐Chiral Phosphinoferrocenes and their Electronic Modification
作者:Marcus Korb、Dieter Schaarschmidt、Martin Grumbt、Matthias König、Heinrich Lang
DOI:10.1002/ejic.202000414
日期:2020.8.23
concept of “flexible steric bulk” is discussed at 2‐phenylvinyl‐1‐phosphinoferrocenes. The introduction of freely rotatable 1'‐silyl groups increases the catalytic productivity within the synthesis of tri‐ortho‐substituted biaryls by Suzuki–Miyaura C,C cross‐coupling reactions, giving higher yields with 1/4 of catalyst concentration than for the non‐silylated derivatives. Electronic modification of
An Extremely Active Catalyst for the Negishi Cross-Coupling Reaction
作者:Jacqueline E. Milne、Stephen L. Buchwald
DOI:10.1021/ja0474493
日期:2004.10.1
A new catalyst system for the Pd-catalyzed cross-coupling of organozinc reagents with aryl halides (Negishi coupling) has been developed. This system permits efficient preparation of hindered biaryls (tri- and tetra-ortho-substituted), functions effectively at low levels of catalyst, and tolerates a wide range of functional groups and heterocyclic substrates. A systematic study of ligand structure
Design and Discovery of Water-Soluble Benzooxaphosphole-Based Ligands for Hindered Suzuki–Miyaura Coupling Reactions with Low Catalyst Load
作者:Arun D. R. Shada、Hari P. R. Mangunuru、Leila Terrab、Srinivasarao Tenneti、Nageswara Rao Kalikinidi、Santhosh Reddy Naini、Praveen Gajula、Emily B. Crull、Venumadhav Janganati、Raghavendra Kovvuri、Vasudevan Natarajan、Daniel Lee、Jinya Yin、Lalith Samankumara、Rohit Mahar、Xueyi Zhang、Anji Chen、Chathuranga C. Hewa-Rahinduwage、Zhirui Wang、Manasa Mamunooru、Jagruti Rana、Chaitanya S. Wannere、Joseph D. Armstrong、R. Thomas Williamson、Gopal Sirasani、Bo Qu、Chris H. Senanayake
DOI:10.1021/acs.orglett.3c01663
日期:2024.4.12
benzooxaphosphole-based, water-soluble ligands in the application of Suzuki–Miyaura cross-coupling reactions for stericallyhindered substrates in aqueous media. The catalytic activities of the coupling reactions were greatly enhanced by the addition of catalytic amounts of organic phase transfer reagents, such as tetraglyme and tetrabutylammonium bromide. The optimized general protocol can be conducted
A highly general, active, and stable catalytic system was realized in the palladium-catalyzed Suzuki-Miyaura reactions of sterically hindered aryl bromides with arylboronic acids using biphenylene-substituted di-tert-butylruthenocenylphosphine (R-Phos) as a supporting ligand.