We report highly enantioselective dirhodium-catalyzed B−H bondinsertion reactions with diaryl diazomethanes as carbene precursors. These reactions afforded chiral gem-diarylmethine borane compounds in high yield (up to 99 % yield), high activity (turnover numbers up to 14 300), high enantioselectivity (up to 99 % ee) and showed unprecedented broad functional group tolerance.
Copper(II) Acetate-Catalyzed Addition of Arylboronic Acids to Aromatic Aldehydes
作者:Hanmei Zheng、Qiang Zhang、Jiuxi Chen、Miaochang Liu、Shuanghua Cheng、Jinchang Ding、Huayue Wu、Weike Su
DOI:10.1021/jo802225j
日期:2009.1.16
A novel copper-catalyzed protocol for the synthesis of carbinol derivatives has been developed. In the presence of copper(II) acetate and dppf, carbinol derivatives were prepared by the addition of arylboronic acids to aromatic aldehydes in good to excellent yields. Moreover, the rigorous exclusion of air or moisture is not required in these transformations.
Reaction of aryl- or heteroarylboronicacids with aldehydes, in the presence of PdCl2 and P(1-Nap)3, afforded carbinol derivatives in good to excellent yields. The efficiency of this reaction was demonstrated by the compatibility with nitro, cyano, acetamido, acetoxy, acetyl, carboxyl, trifluoromethyl, fluoro, and chloro groups and the possibility of involving aliphatic aldehyde or hindered substrates
Melamine-Based Porous Organic Polymers Supported Pd(II)-Catalyzed Addition of Arylboronic Acids to Aromatic Aldehydes
作者:Kai Shen、Min Wen、Chaogang Fan、Shaohui Lin、Qinmin Pan
DOI:10.1007/s10562-020-03508-1
日期:2021.9
5′-dialdehyde by a one-pot method and fully characterized. Divalent palladium salts were coordinated to this polymer network which successfully catalyzed the nucleophilic addition reaction of arylboronicacids to aromatic aldehydes. With only 1.0 mol% heterogeneous catalyst loading, high reaction yields (> 85%) can be achieved in most cases. The scope of substrates was also investigated and the catalyst showed