献给恩斯特·绍曼(Ernst Schaumann)教授70岁生日之际 抽象 研究了使用KO t -Bu或三甲基甲硅烷基三氟甲磺酸盐/Hünig碱将β-酮烯酰胺分子内缩合为2-和/或4-吡啶酮衍生物。随后环化产物不被烧蚀,可以通过Suzuki-Miyaura偶联剂轻松纯化并进一步官能化,从而产生新的高度取代的吡啶衍生物。讨论了环缩合的区域选择性对β-酮烯酰胺结构的依赖性。 研究了使用KO t -Bu或三甲基甲硅烷基三氟甲磺酸盐/Hünig碱将β-酮烯酰胺分子内缩合为2-和/或4-吡啶酮衍生物。随后环化产物不被烧蚀,可以通过Suzuki-Miyaura偶联剂轻松纯化并进一步官能化,从而产生新的高度取代的吡啶衍生物。讨论了环缩合的区域选择性对β-酮烯酰胺结构的依赖性。
献给恩斯特·绍曼(Ernst Schaumann)教授70岁生日之际 抽象 研究了使用KO t -Bu或三甲基甲硅烷基三氟甲磺酸盐/Hünig碱将β-酮烯酰胺分子内缩合为2-和/或4-吡啶酮衍生物。随后环化产物不被烧蚀,可以通过Suzuki-Miyaura偶联剂轻松纯化并进一步官能化,从而产生新的高度取代的吡啶衍生物。讨论了环缩合的区域选择性对β-酮烯酰胺结构的依赖性。 研究了使用KO t -Bu或三甲基甲硅烷基三氟甲磺酸盐/Hünig碱将β-酮烯酰胺分子内缩合为2-和/或4-吡啶酮衍生物。随后环化产物不被烧蚀,可以通过Suzuki-Miyaura偶联剂轻松纯化并进一步官能化,从而产生新的高度取代的吡啶衍生物。讨论了环缩合的区域选择性对β-酮烯酰胺结构的依赖性。
Zinc-catalyzed reaction of isoxazoles with thioynol ethers involving an unprecedented 1,2-sulfur migration
作者:Xin-Qi Zhu、Qing Sun、Zhi-Xin Zhang、Bo Zhou、Pei-Xi Xie、Wen-Bo Shen、Xin Lu、Jin-Mei Zhou、Long-Wu Ye
DOI:10.1039/c8cc03140a
日期:——
A novel zinc-catalyzed reaction of isoxazoles with thioynol ethers involving an unprecedented 1,2-sulfur migration has been developed, which represents the first example of a non-noble metal-catalyzed reaction between isoxazoles and alkynes. This method allows the facile and atom-economical synthesis of a range of valuable β-keto enamides. Moreover, the computational study provides further evidence
Synthesis of pyridin-2(1H)-ones by the intramolecular cyclization of amides of β-enamino ketones
作者:D. S. Goncharov、A. S. Kostuchenko、A. S. Fisyuk
DOI:10.1007/s10593-009-0358-8
日期:2009.7
It has been shown that intramolecularcyclization of N-(1-methyl-3-oxobut-1-en-1-yl)phenyl- and -tosylacetamides in basic media lead to 3-phenyl- and 3-tosyl-substituted 4,6-dimethylpyridin-2(1H)-ones.
The Conversion of β-Ketonitriles to β-Ketoamides by Boron Fluoride in Aqueous Acetic Acid and by Polyphosphoric Acid<sup>1</sup>
作者:Charles R. Hauser、Charles J. Eby
DOI:10.1021/ja01560a061
日期:1957.2
Trimethylsilyl Trifluoromethanesulfonate-Promoted Cyclocondensation of β-Ketoenamides and Subsequent Nonaflation to Pyrid-2-yl and Pyrid-4-yl Nonaflates as Flexible Precursors for Polysubstituted Pyridines
作者:Hans-Ulrich Reissig、Paul Hommes、Sarah Berlin
DOI:10.1055/s-0033-1338548
日期:——
Dedicated to Professor Ernst Schaumann on the occasion of his70thbirthday Abstract The intramolecular condensation of β-ketoenamides to 2- and/or 4-pyridone derivatives using either KOt-Bu or trimethylsilyl trifluoromethanesulfonate/Hünig’s base was investigated. Subsequent nonaflation of the cyclization products allowed a facile purification and further functionalization through Suzuki–Miyaura couplings
献给恩斯特·绍曼(Ernst Schaumann)教授70岁生日之际 抽象 研究了使用KO t -Bu或三甲基甲硅烷基三氟甲磺酸盐/Hünig碱将β-酮烯酰胺分子内缩合为2-和/或4-吡啶酮衍生物。随后环化产物不被烧蚀,可以通过Suzuki-Miyaura偶联剂轻松纯化并进一步官能化,从而产生新的高度取代的吡啶衍生物。讨论了环缩合的区域选择性对β-酮烯酰胺结构的依赖性。 研究了使用KO t -Bu或三甲基甲硅烷基三氟甲磺酸盐/Hünig碱将β-酮烯酰胺分子内缩合为2-和/或4-吡啶酮衍生物。随后环化产物不被烧蚀,可以通过Suzuki-Miyaura偶联剂轻松纯化并进一步官能化,从而产生新的高度取代的吡啶衍生物。讨论了环缩合的区域选择性对β-酮烯酰胺结构的依赖性。