Pd-Catalyzed Carbonylation of Vinyl Triflates To Afford α,β-Unsaturated Aldehydes, Esters, and Amides under Mild Conditions
作者:Shaoke Zhang、Helfried Neumann、Matthias Beller
DOI:10.1021/acs.orglett.9b00765
日期:2019.5.17
An efficient and general protocol for the synthesis of α,β-unsaturated aldehydes, esters, and amides via carbonylation of vinyl triflates including derivatives of camphor, ketoisophorone, verbenone, and pulegone was developed. Crucial for these transformations is the use of a specific palladium catalyst containing a pyridyl-substituted dtbpx-type ligand. This procedure also allows for an easy access
开发了一种有效的通用方案,可通过乙烯基三氟甲磺酸酯的羰基化反应合成α,β-不饱和醛,酯和酰胺,包括樟脑,酮异佛尔酮,马鞭草酮和普乐酮。这些转化的关键是使用含有吡啶基取代的d t bpx型配体的特定钯催化剂。该方法还使得容易从相应的酮获得二羰基化产物。
Palladium-catalyzed formylation of organic halides with carbon monoxide and tin hydride
作者:Victor P. Baillargeon、J. K. Stille
DOI:10.1021/ja00263a015
日期:1986.2
La formylation catalysee par le palladium d'une variete de substrats organiques (iodoarenes, halogenures benzyliques, iodures vinyliques, triflates de vinyles et halogenures allyliques) avec le tributylstannane et le monoxyde de carbone donne les aldehydes avec de bons rendements dans des conditions douces et tolere un certain nombre de groupes fonctionnels
La formylation catalysee par le palladium d'une variete de substrats Organics特定的团体名称
An Efficient Procedure for Palladium-Catalyzed Hydroformylation of Aryl/Enol Triflates
作者:Hiyoshizo Kotsuki、Probal Kanti Datta、Hitoshi Suenaga
DOI:10.1055/s-1996-4246
日期:1996.4
An efficient method for hydroformylation of aryl and enol trifluoromethanesulfonates is presented. Their reaction with carbon monoxide, trioctylsilane, and triethylamine in the presence of a catalytic amount of palladium acetate and 1,3-bis(diphenylphosphanyl)propane proceeds efficiently to provide a variety of aromatic and α,β-unsaturated aldehydes.
Palladium-Catalyzed Reactions of Enol Ethers: Access to Enals, Furans, and Dihydrofurans
作者:Matthew G. Lauer、William H. Henderson、Amneh Awad、James P. Stambuli
DOI:10.1021/ol3028994
日期:2012.12.7
The palladium-catalyzed oxidation of alkyl enolethers to enals, which employs low loadings of a palladium catalyst, is described. The mild oxidation conditions tolerate a diverse array of functional groups, while allowing the formation of di-, tri-, and tetrasubtituted olefins. The application of this methodology to intramolecular reactions of alkyl enolethers containing pendant alcohols provides
Saegusa Oxidation of Enol Ethers at Extremely Low Pd-Catalyst Loadings under Ligand-free and Aqueous Conditions: Insight into the Pd(II)/Cu(II)-Catalyst System
作者:Quan Zhu、Yunsong Luo、Yongyan Guo、Yushun Zhang、Yunhai Tao
DOI:10.1021/acs.joc.0c02987
日期:2021.4.16
system of Saegusa oxidation, which converts enolethers to the corresponding enals with a number of diverse substrates at extremely low catalyst loadings (500 mol ppm) under ligand-free and aqueous conditions, is described. Its synthetic utility was demonstrated by large-scale applications of the catalyst system to important nature molecules. This work allows Saegusa oxidation to become a highly practical