Green, rapid, and highly efficient syntheses of
<i>α</i>
,
<i>α′</i>
‐bis[(aryl or allyl)idene]cycloalkanones and 2‐[(aryl or allyl)idene]‐1‐indanones as potentially biologic compounds via solvent‐free microwave‐assisted Claisen–Schmidt condensation catalyzed by MoCl
<sub>5</sub>
作者:Reza Bakhshi、Behzad Zeynizadeh、Hossein Mousavi
DOI:10.1002/jccs.201900081
日期:2020.4
A new, green, and highly efficient protocol for the expeditious preparation of some α,α′‐bis[(aryl or allyl)idene]cycloalkanones and 2‐[(aryl or allyl)idene]‐1‐indanones via a simple microwave‐assisted Claisen–Schmidt condensation reaction catalyzed by MoCl5 was successfully developed. Outstanding features of the current methodology include the use of solvent‐free conditions, simple operation, use of
Chloride anions associated with various soft cations (like tetraalkyl ammoniums, alkyl imidazoliums or pyridiniums) were shown to be able to promote the alkylation of carbonyl derivatives with acidic compounds, as exemplified on Knoevenagel and aldol condensations under relatively mild conditions. This activity was attributed to an enhanced nucleophilicity of the chlorine anion, originating from a
A chemoselective iridium-catalyzed transfer hydrogenation of α, β-unsaturatedketones was realized in water. The CC double bonds of 2-benzylidene indanones and analogues were hydrogenated exclusively catalyzed by an iridium complex (0.1 mol%) bearing a pyridine-imidazoline ligand, using a mixture of formic acid/triethyl amine (molar ratio: 5/2) as a hydrogen source in water. A series of 2-benzyl indanones
Iron‐Catalyzed Oxyphosphorylation of Styrenes to Access <i>β</i>‐Ketophosphonates and <i>α</i>, <i>β</i>‐Unsaturated Ketones
作者:Yukun Zhao、Jingwen Xu、Hongbing Chen、Yi Xia、Lin Hu
DOI:10.1002/adsc.202300733
日期:2023.10.13
developed, which generates a range of previously underexplored α-substituted β-ketophosphonates in 55~70% yields. Furthermore, a convenient one-pot procedure by direct conversion of styrenes to α, β-unsaturatedketones is also developed based on the new catalytic reactions, thus offering a protocol to access two classes of valuable products from simple starting materials.