Palladium-Catalyzed Stereospecific Decarboxylative Benzylation of Alkynes
摘要:
Enantioenriched benzyl esters of propiolic acids undergo highly stereospecific decarboxylative coupling to provide 1,1-diarylethynyl methanes. This sp-sp(3) coupling does not require strongly basic conditions or preformed organometallics and produces CO2 as the sole byproduct. Ultimately, this method results in the successful transfer of stereochemical information from secondary benzyl alcohols to generate enantioenriched tertiary diarylmethanes.
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.
Recyclable and reusable Pd(OAc)2/P(1-Nap)3/[bmim][PF6]/H2O system for the addition of arylboronic acids to aldehydes
作者:Hong Zhao、Mingzhu Cheng、Tinli Zhang、Mingzhong Cai
DOI:10.1016/j.jorganchem.2014.11.020
日期:2015.2
A stable and efficient Pd(OAc)2/P(1-Nap)3[tri(1-naphthyl)phosphine] catalytic system for the addition of arylboronicacids to aldehydes has been developed. In the presence of Pd(OAc)2 and P(1-Nap)3, the addition reaction of arylboronicacids with aldehydes was carried out smoothly at 65 °C to give a variety of carbinol derivatives in good to excellent yields using a mixture of [bmim][PF6] and water
Decarboxylative dearomatization and mono-α-arylation of ketones
作者:Shehani N. Mendis、Jon A. Tunge
DOI:10.1039/c6cc03672d
日期:——
We report the first example of a palladium-catalyzeddecarboxylative dearomatization reaction that occurs via Pd-[small pi]-benzyl intermediates. In fact, the Pd-catalyzed decarboxylativecross-coupling reaction of benzyl enol carbonates can lead to...
Co-catalyzed arylation of aldehydes and aryltrimethylgermanes
作者:Qiang Zhang、Xiao Zou、Ningqi Zhang、Bo Liu
DOI:10.1039/d3ra00836c
日期:——
A novel cobalt-catalyzed protocol for the synthesis of carbinol derivatives and benzil derivatives has been developed. In the presence of CoI2 as the catalyst and tmphen (3,4,7,8-tetramethyl-1,10-phenanthroline) as the ligand, the corresponding arylated products were obtained from the addition of aryltrimethylgermanes to aromatic aldehydes and arylglyoxals in moderate to excellent yields under air