开发了一种通过金( I )催化剂合成2-吡啶酮醇的高效方法。确定了甲磺酸对金催化剂的反应进程的影响。所提出的机制涉及分别源自2-炔丙基氧基吡啶和 2-(but-3-yn-1-yloxy)吡啶的氮的 5- exo-dig和 6 -exo-dig加成的分子内环化产物形成。由金 ( I ) 催化剂和甲磺酸形成的吡啶盐在弱碱性介质(5% Na 2 CO 3水溶液)中发生重排反应,形成N-烯基吡啶酮醇。N使用这种方法可以以中等至极好的收率获得-烯基吡啶酮醇。
开发了一种通过金( I )催化剂合成2-吡啶酮醇的高效方法。确定了甲磺酸对金催化剂的反应进程的影响。所提出的机制涉及分别源自2-炔丙基氧基吡啶和 2-(but-3-yn-1-yloxy)吡啶的氮的 5- exo-dig和 6 -exo-dig加成的分子内环化产物形成。由金 ( I ) 催化剂和甲磺酸形成的吡啶盐在弱碱性介质(5% Na 2 CO 3水溶液)中发生重排反应,形成N-烯基吡啶酮醇。N使用这种方法可以以中等至极好的收率获得-烯基吡啶酮醇。
Cobalt-Mediated [2+2+2] Cycloaddition versus CH and NH Activation of Pyridones and Pyrazinones with Alkynes: An Experimental Study
作者:Corinne Aubert、Patrick Betschmann、Michael J. Eichberg、Vincent Gandon、Thilo J. Heckrodt、Jürg Lehmann、Max Malacria、Birgit Masjost、Elisa Paredes、K. Peter C. Vollhardt、Glenn D. Whitener
DOI:10.1002/chem.200601823
日期:2007.9.7
thene) has been investigated. Depending on the nature of the substrates, [2+2+2]- or [2+2] cycloaddition, C-H, or N-H activation may occur. In the case of pyridones, the first three predominated with N-protected derivatives, whereas substrates containing N-H bonds followed an N-H activation pathway. The [2+2+2] cycloaddition of an N-butynylisoquinolone was applied successfully to the total synthesis
Facile synthesis of enol ethers via Zn(OTf)<sub>2</sub>-mediated formal alkyne hydration-Smiles rearrangement
作者:Xinying Chew、Yuhan Lin、Yee Hwee Lim
DOI:10.1039/c4ra00159a
日期:——
Terminal alkynes can be chemoselectively transformed into enol ethers via a formal tandem Markovnikov hydration-Smiles type rearrangement using Zn(OTf)2.
rearrangement of 2-propargyloxypyridine and 2-(but-3-yn-1-yloxy)pyridine under acidic conditions. This approach exhibits significant utility due to its outstanding efficiency of conversion in the synthesis of secondary amines as a one-pot reaction. The initial step of the method involves a cyclization reaction for the production of pyridinium salts, followed by the next stage, where rearrangement is
One-pot gold(<scp>i</scp>)-catalyzed synthesis of 2-pyridonyl alcohols
作者:Ali Osman Karatavuk
DOI:10.1039/d1ob01950c
日期:——
A highly efficient method for the synthesis of 2-pyridonyl alcohols via gold(I) catalyst was developed. The effect of methanesulfonic acid on the reaction progression with the gold catalyst was determined. The proposed mechanism involves intramolecular cyclization product formation derived from 5-exo-dig and 6-exo-dig addition of the nitrogen for 2-propargyloxypyridine and 2-(but-3-yn-1-yloxy)pyridine
开发了一种通过金( I )催化剂合成2-吡啶酮醇的高效方法。确定了甲磺酸对金催化剂的反应进程的影响。所提出的机制涉及分别源自2-炔丙基氧基吡啶和 2-(but-3-yn-1-yloxy)吡啶的氮的 5- exo-dig和 6 -exo-dig加成的分子内环化产物形成。由金 ( I ) 催化剂和甲磺酸形成的吡啶盐在弱碱性介质(5% Na 2 CO 3水溶液)中发生重排反应,形成N-烯基吡啶酮醇。N使用这种方法可以以中等至极好的收率获得-烯基吡啶酮醇。