two: α‐Diazocarbonyl compounds display a diverse pattern of reactivity upon palladium‐catalyzed reaction with esters. Esters bearing an alkynyl group on the carbonyl carbon atom lead to two different CC bonds at the same carbon atom in a single operation through decarboxylation and migratory insertion, whereas aromatic and benzylic acid derivatives afford aromatic and benzylic esters bearing an O‐substituted
[Pd(μ-Br)(P<sup><i>t</i></sup>Bu<sub>3</sub>)]<sub>2</sub> as a Highly Active Isomerization Catalyst: Synthesis of Enol Esters from Allylic Esters
作者:Patrizia Mamone、Matthias F. Grünberg、Andreas Fromm、Bilal A. Khan、Lukas J. Gooßen
DOI:10.1021/ol301563g
日期:2012.7.20
to be highly active for catalyzing double-bond migration in various substrates such as unsaturated ethers, alcohols, amides, and arenes, under mild conditions. It efficiently mediates the conversion of allylic esters into enolesters, rather than inserting into the allylic C–O bond. The broad applicability of this reaction was demonstrated with the synthesis of 22 functionalized enolesters.
发现二聚体Pd(I)络合物[Pd(μ-Br)(P t Bu 3)] 2具有高活性,可催化不饱和醚,醇,酰胺和芳烃等各种底物中的双键迁移,在温和的条件下。它有效地调节了烯丙基酯到烯醇酯的转化,而不是插入烯丙基C–O键。通过合成22种官能化的烯醇酯证明了该反应的广泛适用性。
Atmospheric Oxygen Mediated Radical Hydrothiolation of Alkenes
作者:Ruairí O. McCourt、Eoin M. Scanlan
DOI:10.1002/chem.202002542
日期:2020.12.4
hydrothiolation of alkenes (and alkyne) is reported. A variety of sulfur containing motifs including alkanethiols, thiophenols and thioacids undergo an atmospheric oxygen‐mediated radical hydrothiolation reaction with a plethora of alkenes in good yield with excellent functional group compatibility, typically with short reaction times to furnish a range of functionalized products. Biomolecules proved
reaction via the palladium-catalyzed insertion of isocyanide has been established. Isocyanides were inserted into C−O bond under mild conditions, using the readily available allylester as the starting materials. In addition, the intramolecular acyl transfer from the ester group oxygen atom to the isocyanide nitrogen atom afforded imide derivatives in moderate to excellent yields. Additionally, this
Rhenium-catalyzed allylation of C–H bonds of benzoic and acrylic acids
作者:Yoichiro Kuninobu、Kazuhiro Ohta、Kazuhiko Takai
DOI:10.1039/c1cc12359a
日期:——
We have succeeded in the allylation of aromatic and olefinic CâH bonds of benzoic and acrylic acids using a rhenium catalyst, Re2(CO)10. In this reaction, isomerization of the introduced allyl group to the 1-propenyl group did not occur.