t-Bu-Amphos–RhCl3·3H2O: a highly recyclable catalyst system for the cross-coupling of aldehydes and aryl- and alkenylboronic acids in aqueous solvents
作者:Rongcai Huang、Kevin H. Shaughnessy
DOI:10.1039/b509406b
日期:——
The combination of t-Bu-Amphos and RhCl3·3H2O gave the first highly recyclable catalyst for the coupling of aryl- and vinylboronic acids with aldehydes in aqueous solvents.
<scp>Nickel‐Catalyzed</scp>Reductive Coupling of Aldehydes with Alkynes Mediated by Alcohol<sup>†</sup>
作者:Yan‐Long Zheng、Mengchun Ye
DOI:10.1002/cjoc.201900543
日期:2020.5
A nickel‐catalyzed reductive coupling of aldehydes with alkynes using 1‐phenylethanol as reducing agent has been developed. The key achievement of this work is that we demonstrate environmentally benign 1‐phenylethanol can serve as a viable alternative reducing agent to Et3B, ZnEt2 and R3SiH for the nickel‐catalyzed reductive coupling reaction of aldehyde and alkynes.
generation N,O-[2.2]paracyclophaneketimineligands were investigated for their ability to catalyze the 1,2-addition of alkenylzinc reagents to aliphatic and aromaticaldehydes with special focus on functionalized substrates. For aliphaticaldehydes, which have always been challenging in this field, remarkably high enantiomeric excesses could be determined (50–95 % ee). However, alkenylzinc reagents
Highly Selective Catalytic Intermolecular Reductive Coupling of Alkynes and Aldehydes
作者:Wei-Sheng Huang、Johann Chan、Timothy F. Jamison
DOI:10.1021/ol006781q
日期:2000.12.1
Alkynes (internal and terminal) and aldehydes (aromatic and aliphatic) are reductively coupled in a single catalytic reaction to yield di- and trisubstituted allylic alcohols with high stereoselectivity and regioselectivity. In most cases, a 1:1 ratio of alkyne to aldehyde is sufficient for efficient coupling. The yield and regioselectivity are strongly dependent on the phosphine ligand, but the allylic