在此,我们描述了一种通过末端炔烃与 TMSCF 3和 NaI的碘甲酰化合成 ( E )-β-碘-α,β-不饱和醛的方法。这种合成方法使用廉价且易于处理的化学原料,并采用市售的 CuI 催化剂。它可以将多种末端炔烃转化为具有优异化学选择性、区域选择性和立体选择性的双亲电子( E )-β-碘-α,β-不饱和醛。此外,证明该协议具有丰富的有机反应性。
The thermal cyclization of 3,4-diphenylbuta-1,3-dienyl isocyanates 1, generated in situ from the corresponding azides, was investigated using iodine as a catalyst. Diphenylpyridinones 2, phenylnaphthalenes 3, and indenes 4 were produced viaintramolecularringclosure. The nature of the substituents on the phenyl rings was found to be crucial to the distribution of cyclized products 2–4. The mechanism
A new porousorganicpolymer supported rhodium catalyst (Rh/POL-BINAPa&PPh3) has been developed for the hydroformylation of various alkynes to afford the corresponding α,β-unsaturated aldehydes with high chem- and stereoselectivity, excellent catalytic activity and good reusability (10 cycles). The heterogeneouscatalyst exhibited more catalytic activity than the comparable homogeneous Rh/BINAPa/PPh3
[EN] VINYLOGOUS CHALCONE DERIVATIVES AND THEIR MEDICAL USE<br/>[FR] DÉRIVÉS DE CHALCONE VINYLOGUE ET LEUR UTILISATION MÉDICALE
申请人:UNIV WIEN MED
公开号:WO2012013725A1
公开(公告)日:2012-02-02
The present invention relates to vinylogous chalcone derivatives, in particular the compounds of formula (I) as described and defined herein, pharmaceutical compositions comprising these compounds, and their medical use, including their use in the treatment or prevention of cancer, in particular malignant hematological diseases/disorders.
Proline-catalyzed synthesis of α-substituted (<i>E</i>)-α,β-unsaturated aldehydes from epoxides
作者:Ajay Sharma、Satyendra Kumar Pandey
DOI:10.1039/d3ob01750h
日期:——
simple and metal-free tandem approach for synthesizing α-substituted (E)-α,β-unsaturatedaldehyde derivatives through acid-catalyzed epoxide rearrangement and organocatalyzed aldol condensation processes has been described. This transformation has a broad substrate scope under mild conditions, including epoxides and aldehydes containing diverse functional groups, resulting in moderate to high yields
描述了一种新颖、简单且无金属的串联方法,通过酸催化环氧化物重排和有机催化羟醛缩合过程合成α-取代( E )-α,β-不饱和醛衍生物。该转化在温和条件下具有广泛的底物范围,包括含有不同官能团的环氧化物和醛,从而产生中等到高产率的所需产物。最终,大规模反应和一些生物活性分子的合成被用来证明所开发方法的潜在适用性。
Ruthenium-Catalyzed Aldehyde Functionality Reshuffle: Selective Synthesis of <i>E</i>-2-Arylcinnamaldehydes from <i>E-</i>β-Bromostyrenes and Aryl Aldehydes
作者:Ping Wang、Honghua Rao、Feng Zhou、Ruimao Hua、Chao-Jun Li
DOI:10.1021/ja306025d
日期:2012.10.10
A new concept for highly selective synthesis of E-2-arylcinnamaldehydes has been developed via a formal arylformylation of E-beta-bromostyrenes with readily available aryl aldehydes. This strategy involves an overall reshuffle of the aldehyde functionality with a loss of hydrogen bromide.