Ultrasound-promoted carbonyl allylation by allylic alcohols with palladium–tin dichloride in nonpolar solvents: inversed regiocontrol of carbonyl allylation in polar solvents
Catalytic Allylation of Aldehydes Using Unactivated Alkenes
作者:Shun Tanabe、Harunobu Mitsunuma、Motomu Kanai
DOI:10.1021/jacs.0c04735
日期:2020.7.15
and a chromium complex catalyst, enabling catalytic allylation of aldehydes with simplealkenes, including feedstock lower alkenes. The reaction proceeded under visible-light irradiation at room temperature and with high functional group tolerance. The reaction was extended to an asymmetric variant by employing a chiral chromium complex catalyst.
Ultrasound-promoted carbonyl allylation by allylic alcohols with palladium–tin dichloride in nonpolar solvents: inversed regiocontrol of carbonyl allylation in polar solvents
Heterogeneous carbonyl allylation by γ-substituted allylic alcohols with PdâSnCl2 in a nonpolar solvent such as diethyl ether was promoted by ultrasound to cause α-addition, with a regioselectivity which is the inverse of that in homogeneous carbonyl allylation in polar solvents such as dimethylformamide, 1,3-dimethylimidazolidin-2-one and tetrahydrofuranâH2O.