Visible-Light Photoredox Enables Ketone Carbonyl Alkylation for Easy Access to Tertiary Alcohols
作者:Minh Duy Vu、Mrinmoy Das、Aoxin Guo、Zi-En Ang、Miloš D̵okić、Han Sen Soo、Xue-Wei Liu
DOI:10.1021/acscatal.9b02401
日期:2019.10.4
handle for synthesizing quaternary carbon centers and olefins, together with ubiquitous appearance in organic building blocks, makes tertiaryalcohols valuable targets in synthesis. However, traditional syntheses of these alcohols have faced several challenges including the employment of functionalized reactive reagents, undesirable side reactions, and decomposition of the alcohol products under harsh
Here we report a strategy for carbonyl addition with unactivated alkenes using an organic photocatalyst on both aldehyde and ketone substrates. This protocol grants us a good alternative to the traditional Barbier–Grignardallylation that exhibits poor functional group tolerance. With this method the stoichiometric use of metals can be avoided, high atom economy can be achieved and fewer by-products
Generation of Carbanions through Stibine–Metal and Bismuthine–Metal Exchange Reactions and Its Applications to Precision Synthesis of ω‐End‐Functionalized Polymers
作者:Eiichi Kayahara、Hiroto Yamada、Shigeru Yamago
DOI:10.1002/chem.201100265
日期:2011.5.2
by the end‐group transformation of living polymers that bear these heteroatom species at the ω‐polymerend, prepared by using organostibine and bismuthine‐mediated living radical polymerizations. Various polymers that bear polar functional groups and acidic hydrogen—for example, poly(methyl methacrylate), poly(butyl acrylate), poly(N‐isopropyl acrylamide), and poly(2‐hydroxyethyl methacrylate)—could
A process for the stereoselective preparation of a P-chiral four-co-ordinated phosphorus compound, the process comprising reacting a first reactant selected from the group consisting of a chiral alcohol, chiral amine or chiral thiol, with a second reactant comprising a P-chiral three-co-ordinated phosphorus compound, in the presence of an electrophile.
Reactivity of the secondary benzylic Grignard reagent from 1-phenylethyl chloride with aldehydes and ketones. More evidence for the rearrangement mechanism in benzyl Grignard reactions
作者:Claude Bernardon
DOI:10.1016/0022-328x(89)87200-6
日期:1989.5
the reaction of the Grignard reagent from benzyl chloride with aldehydes has been obtained from a study of the interaction of the Grignard reagent from 1-phenylethyl chloride with carbonyl compounds. This Grignard reagent reacts with ketones (except non-enolisable ketones) to give normal alcohols in low yields, and with aldehydes to give diols. However, in contrast to that formed in the reaction of