Palladium-Catalyzed Oxidative Rearrangement of Tertiary Allylic Alcohols to Enones with Oxygen in Aqueous Solvent
作者:Jingjie Li、Ceheng Tan、Jianxian Gong、Zhen Yang
DOI:10.1021/ol502578h
日期:2014.10.17
A one-pot procedure for Pd(TFA)2-catalyzed 1,3-isomerization of tertiary allylic alcohols to secondary allylic alcohols followed by a Pd(TFA)2/neocuproine-catalyzed oxidative reaction to β-disubstituted-α,β-unsaturated kenones was developed.
Enzyme- and Ruthenium-Catalyzed Dynamic Kinetic Resolution of Functionalized Cyclic Allylic Alcohols
作者:Richard Lihammar、Renaud Millet、Jan-E. Bäckvall
DOI:10.1021/jo402086z
日期:2013.12.6
Enantioselective synthesis of functionalized cyclic allylic alcohols viadynamic kinetic resolution has been developed. Cyclopentadienylruthenium catalysts were used for the racemization, and lipase PS-IM or CALB was employed for the resolution. By optimization of the reaction conditions the formation of the enone byproduct was minimized, making it possible to prepare a range of optically active functionalized
Concise Total Syntheses of (±)-Joubertiamine, (±)-O-Methyljoubertiamine, (±)-3′-Methoxy-4′-O-methyljoubertiamine, (±)-Mesembrane, and (±)-Crinane
作者:Alakesh Bisai、Mrinal Das、Subhadip De
DOI:10.1055/s-0035-1561583
日期:——
Subsequent simple allylic oxidation of Eschenmoser–Claisen products and synthetic elaborations (reductions/oxidations) enabled the totalsyntheses of the title compounds to be completed in good yields in a few steps. The strategic viability was further tested in the totalsyntheses of Amaryllidaceae alkaloids (±)-mesembrane and (±)-crinane. Towards this end, we synthesized advanced intermediate keto-aldehydes
Compounds of formula (II) are useful in modulating voltage-gated sodium channel activity. Their preparation and use for reducing the severity of convulsant activity in a subject, for example in the treatment of epilepsy, is presented.