Pd-catalyzed asymmetric carboetherification of γ,δ-alkenyl oximes with (hetero)aryl and alkenyl halides in the presence of a commercially available bisphosphine ligand. The enantioenriched products can be facilely converted to functionalized alcohols with high fidelity of chiral transfer.
Pd-catalyzed domino carbonylative–decarboxylative allylation: an easy and selective monoallylation of ketones
作者:Steven Giboulot、Frédéric Liron、Guillaume Prestat、Benoit Wahl、Mathieu Sauthier、Yves Castanet、André Mortreux、Giovanni Poli
DOI:10.1039/c2cc32391e
日期:——
In the presence of an allyl alcohol, α-chloroacetophenones undergo an allyloxycarbonylation reaction followed by in situ decarboxylative allylation to selectively afford the corresponding monoallylated ketones via a Pd-catalyzed domino sequence. The scope of the reaction was extended to substituted α-chloroacetophenones as well as various allyl alcohols.
Highly Efficient and Eco-Friendly Gold-Catalyzed Synthesis of Homoallylic Ketones
作者:Adrián Gómez-Suárez、Danila Gasperini、Sai V. C. Vummaleti、Albert Poater、Luigi Cavallo、Steven P. Nolan
DOI:10.1021/cs500806m
日期:2014.8.1
We report a new catalytic protocol for the synthesis of γ,δ−unsaturated carbonyl units from simple starting materials, allylic alcohols and alkynes, via a hydroxalkoxylation/Claisen rearrangement sequence. This new process is more efficient (higher TON and TOF) and more eco-friendly (increased mass efficiency) than the previous state-of-the-art technique. In addition, this method tolerates both terminal
remains underdeveloped. Herein we report the copper-catalyzed Cope-type hydroamination of oximes with pendant nonactivated olefins, which enables facile access to a series of five- and six-membered cyclic nitrones under mild conditions. In this study, heterocycle-tethered oximes were employed in the Cope-type hydroaminationreaction for the first time. High enantioselectivity was achieved for carbon-tethered
novel and atom-economic palladium-catalyzed isomerization-hydrocarbonylative cyclization reaction of 1,5-dienes to 2-alkylidenecyclopentanones has been developed, which provides a rapid and straightforward approach to 2-alkylidenecyclopentanones with high stereoselectivity. The reaction was found to proceed via alkene isomerization and selective hydrocarbonylative cyclization to generate 2-alkylidenecyclopentanones