Room-Temperature Ni(0)-Catalyzed Cross-Coupling Reactions of Aryl Arenesulfonates with Arylboronic Acids

Room-temperature Ni(0)-catalyzed cross-coupling reactions of aryl arenesulfonates with arylboronic acids are described. The Ni(0) catalyst, derived from Ni(COD)2 and PCy3, proved to be a general one for the Suzuki−Miyaura cross-coupling of a variety of aryl arenesulfonates. The mild reaction condition, the readily availability of the catalyst, and excellent coupling yields make aryl arenesulfonates potentially useful substrates in organic synthesis

Triphenylphosphine as a Ligand for Room-Temperature Ni(0)-Catalyzed Cross-Coupling Reactions of Aryl Chlorides with Arylboronic Acids

Room-temperature Ni(0)-catalyzed cross-coupling reactions of deactivated aryl chlorides with arylboronic acids with inexpensive triphenylphosphine (PPh3) as a supporting ligand have been accomplished in good to excellent yields. Air-stable Ni(PPh3)2Cl2 has also been established as catalyst precursor, and highly active nickel catalysts were obtained when the reduction of Ni(PPh3)2Cl2 with n-BuLi was carried out in the presence of an aryl chloride

Aryl Ketone Synthesis via Tandem Orthoplatinated Triarylphosphite-Catalyzed Addition Reactions of Arylboronic Acids with Aldehydes Followed by Oxidation

Tandem orthoplatinated triaryl phosphite-catalyzed addition reactions of arylboronic acids with aldehydes followed by oxidation to yield aryl ketones is described. 3-Pentanone was identified as a suitable oxidant for the tandem aryl ketone formation reaction. By using microwave energy, aryl ketones were obtained in high yields with the catalyst loading as low as 0.01%

Preferential Oxidative Addition in Palladium(0)-Catalyzed Suzuki Cross-Coupling Reactions of Dihaloarenes with Arylboronic Acids

The study of Pd(0)-/t-Bu3P system as a powerful catalyst for the cross-coupling of n,m-dihaloarenes with 1 equiv of arylboronic acids is described. Our work demonstrated that the fate of the regenerated Pd(0) catalyst can be controlled when the appropriate ligand is employed. The results described here may lead to the development of new, efficient processes to conjugate polymers with controlled length which are potentially useful in molecular electronics

CuCl/Bipyridine-Catalyzed Addition Reactions of Arylboroxines with Aldehydes, α,β-Unsaturated Ketones, and <i>N</i>-Tosyl Aldimines

CuCl/bipyridine-catalyzed addition reactions of arylboroxines with aldehydes and α,β-unsaturated ketones at elevated temperatures were described. By using the microwave energy, CuCl/bipyridine-catalyzed addition reactions of arylboroxines with aldimines were also realized

Pd(OAc)₂-Catalyzed Domino Reactions of 1-Chloro-2-haloarenes and 2-Haloaryl Tosylates with Hindered Grignard Reagents via Palladium-Associated Arynes

The palladium-associated aryne generation strategy and Pd(OAc)2-catalyzed annulative Domino reactions of 1-chloro-2-halobenzenes and 2-haloaryl tosylates with hindered Grignard reagents via palladium-associated arynes are described. The palladium-associated aryne generation strategy described here not only allows the high yield, one-step access to potentially useful substituted fluorenes from readily available 1-chloro-2-halobenzenes and 2-haloaryl tosylates, but may also lead to the development of other tandem reactions based on these readily available ortho leaving group bearing haloarene

A New Approach to Highly Enantioselective Polymeric Chiral Catalysts

A New Approach to Highly Enantioselective Polymeric Chiral Catalyst

A Highly General Catalyst for the Enantioselective Reaction of Aldehydes with Diethylzinc

A Highly General Catalyst for the Enantioselective Reaction of Aldehydes with Diethylzin

The First Optically Active BINOL−BINAP Copolymer Catalyst: Highly Stereoselective Tandem Asymmetric Reactions

The First Optically Active BINOL−BINAP Copolymer Catalyst:  Highly Stereoselective Tandem Asymmetric Reaction

Direct Synthesis of Ferrocenylmethylphosphines from Ferrocenylmethyl Alcohols and Their Application as Ligands for Room Temperature Pd(0)-Catalyzed Suzuki Cross-Couplings of Aryl Bromides

The direct, high-yield conversion of readily available ferrocenylmethyl alcohols to ferrocenylmethylphosphines and the application of ferrocenylmethylphosphines as efficient ligands for room temperature Suzuki cross-coupling reaction of aryl bromides with phenylboronic acid are reported. The procedure of directly converting ferrocenylmethyl alcohols to ferrocenylmethylphosphines described here should find applications in the synthesis of many metallocenylmethylphosphines including optically active ones