Model Guided Development of a Simple Catalytic Method for the Synthesis of Unsymmetrical Stilbenes by Sequential Heck Reactions of Aryl Bromides with Ethylene
作者:Helen Barlow、Jonas Y. Buser、Hendrik Glauninger、Carla V. Luciani、Joseph R. Martinelli、Niall Oram、Nichole Thompson‐Van Hook、Jeffery Richardson
DOI:10.1002/adsc.201800167
日期:2018.7.16
moieties, but methods for their preparation typically possess numerous inefficiencies. Presented here is a methodology for the two‐step, one pot preparation of unsymmetrical stilbenes via sequential Heck reactions. The first Heck reaction with ethylene gas was analysed as a function of temperature and pressure for electronically differentiated naphthyl bromides and model‐aided reaction optimization was utilized
Phase transfer catalysed polymer-supported Wittig reactions
作者:Stephen D. Clarke、Charles R. Harrison、Philip Hodge
DOI:10.1016/s0040-4039(00)74581-3
日期:1980.1
Arylsubstituted olefins can be prepared in high yield using phasetransfer catalysed polymer-supported Wittig reactions.
可以使用相转移催化的聚合物负载的Wittig反应以高收率制备芳基取代的烯烃。
Benzeneseleninic anhydride oxidation of 1,2-diarylethanes and 1,2-diarylethylenes to 1,2-diaryldiketones
作者:Mark D. Clayton、Zbigniew Marcinow、Peter W. Rabideau
DOI:10.1016/s0040-4039(98)02063-2
日期:1998.12
1,2-Diarylethanes and 1,2-diarylethylenes can be oxidized directly to 1,2-diaryldiketones in good yields by reaction with benzeneseleninic anyhdride (BSA) at 120 °C in chlorobenzene.
Rhodium(I)-Catalyzed Reductive Cyclocarbonylation of Internal Alkynes: Atom-Economic Process for Synthesis of 2-Cyclopenten-1-ones, 5-Alkylidenefuran-2(5 <i>H</i>)-ones and Indan-1-ones
作者:Qiufeng Huang、Ruimao Hua
DOI:10.1002/chem.200802462
日期:2009.4.6
Economical atoms: 2‐Cyclopenten‐1‐ones, 5‐alkylidenefuran‐2(5H)‐ones and indan‐1‐ones have been synthesized by atom‐economic reductivecyclocarbonylation of internalalkynes with carbon monoxide catalyzed by [RhCl(CO)2}2]/CO(NH2)2 in the presence of water (see scheme).
Novel synthesis of π-conjugated molecules by cross-metathesis reaction of vinylferrocene with a series of vinylarenes was investigated with a molybdenum-based Schrock catalyst (CHCMe2Ph)Mo(N-2,6-i-Pr2C6H3)[OCMe(CF3)2]2. The cross-metathesis reactions occurred successfully and the cross-metathesis product, i.e., heterodimers, were readily obtained selectively, together with only small amounts of the corresponding self-dimers.