Allyl trimethylsilyl ether reacts with aryl iodides in the presence of palladium acetate and lithium chloride to afford selectively β-aryl (E)-α,β-unsaturated carbonyl compound.
A cationic iridium complex, prepared via the hydrogenation of [Ir(cod)2]PF6–2PPr3 is found to be an excellent catalyst for the stereoselective isomerization of primary allyl silyl ethers to (E)-enol ethers and secondary allyl ethers to (Z)-enol ethers.
[EN] PROCESS FOR PREPARING PERFUMING INTERMEDIATE<br/>[FR] PROCÉDÉ DE PRÉPARATION D'UN INTERMÉDIAIRE PARFUMANT
申请人:FIRMENICH & CIE
公开号:WO2021176009A1
公开(公告)日:2021-09-10
The present invention relates to the field of organic synthesis and more specifically it concerns a process for preparing compound of formula (I) by a cross metathesis reaction. Said compound of formula (I) is valuable new chemical intermediate for producing perfuming ingredients and is also part of the present invention.
Main Group-Catalyzed Cationic Claisen Rearrangements via Vinyl Carbocations
作者:Chloe G. Williams、Sepand K. Nistanaki、Krista Dong、Woojin Lee、Kendall N. Houk、Hosea M. Nelson
DOI:10.1021/acs.orglett.4c00837
日期:2024.6.14
interception of vinyl carbocations with allylethers. The reaction utilizes commercially available borate salts as catalysts and is effective at constructing sterically hindered C–C bonds. The reaction mechanism is studied experimentally and computationally to support a charge-accelerated [3,3] rearrangement of a silyloxonium cation. Our reaction is also applied to the highlystereoselectivesynthesis of fully