Regioselective hydrations of 1-aryl-3-en-1-ynes using gold and platinum catalysts: selective production of 2-en-1-ones and 3-en-1-ones
作者:Bhanudas Dattatray Mokar、Rai-Shung Liu
DOI:10.1039/c4cc02786h
日期:——
Regiocontrolled hydrations of 1-aryl-3-en-1-ynes have been accomplished with IPrAuOTf and PtCl2/CO to yield 3-en-1-ones and 2-en-1-ones efficiently; our experimental data indicates that the sizes of catalysts play an important role.
De novo synthesis of functionalized 1,3-enynes and extended conjugated molecular systems
作者:Maddali L. N. Rao、Priyabrata Dasgupta、Venneti N. Murty
DOI:10.1039/c5ra01544h
日期:——
Pd-catalyzed coupling of 1,3-dienyldibromides with triarylbismuths was demonstrated for the synthesis of a diverse range of 1,3-enynes.
钯催化的1,3-二烯基二溴化物与三芳基双锑的偶联被证明可用于合成多种1,3-炔烃。
Aitken R. Alan, Boeters Christine, Morrison John J., J. Chem. Soc. Perkin Trans. 1, (1994) N 17, S 2473-2480
作者:Aitken R. Alan, Boeters Christine, Morrison John J.
DOI:——
日期:——
Flash vacuum pyrolysis of stabilised phosphorus ylides. Part 6. Pyrolysis of substituted cinnamoyl ylides as a route to conjugated enynes
作者:R. Alan Aitken、Christine Boeters、John J. Morrison
DOI:10.1039/p19940002473
日期:——
The substituted cinnamoyl ylides 6 and 7, readily prepared in one step from the quaternary phosphonium salts 8 and cinnamoyl chlorides 9, undergo extrusion of Ph3PO upon FVP to give the 1,3-enynes 12 and 13 in moderate yield. At 500 °C there is little double bond isomerisation, but at 700 °C this does occur to give almost 1:1 mixtures of E and Z isomers. In a few cases, including those with a nitrophenyl
由季phospho盐8和肉桂酰氯9一步制备的取代肉桂酸酯基化物6和7在FVP上经过Ph 3 PO挤出,以中等收率得到1,3-烯炔12和13。在500°C下几乎没有双键异构化,但是在700°C时确实发生了几乎1:1的E和Z混合物异构体。在少数情况下,包括存在硝基苯基的情况,收率很低或反应完全失败。通过使用酯稳定的内酯来改善1-苯基丁烯的不良产率的尝试仅部分成功,因为失去酯基所需的苛刻条件导致明显的异构化为萘。报告了20个炔的完全归属的13 C NMR光谱。已经制备了一个异构体β,γ-不饱和-δ-氧代酰化物的例子,14,发现在700°C下FVP上的Ph 3 P损失,从而以低收率得到了茚和苯。
Zn<sup>II</sup>- and Au<sup>I</sup>-Catalyzed Regioselective Hydrative Oxidations of 3-En-1-ynes with Selectfluor: Realization of 1,4-Dioxo and 1,4-Oxohydroxy Functionalizations
作者:Appaso Mahadev Jadhav、Sagar Ashok Gawade、Dhananjayan Vasu、Ramesh B. Dateer、Rai-Shung Liu
DOI:10.1002/chem.201304322
日期:2014.2.10
Catalytic 1,4‐dioxo functionalizations of 3‐en‐1‐ynes to (Z)‐ and (E)‐2‐en‐1,4‐dicarbonyl compounds are described. This regioselective difunctionalization was achieved in one‐pot operation through initial alkyne hydration followed by in situ Selectfluoroxidation. The presence of pyridine alters the reaction chemoselectivity to give 4‐hydroxy‐2‐en‐1‐carbonyl products instead. A cooperative action of