Pd-Catalyzed Copper-Free Carbonylative Sonogashira Reaction of Aryl Iodides with Alkynes for the Synthesis of Alkynyl Ketones and Flavones by Using Water as a Solvent
作者:Bo Liang、Mengwei Huang、Zejin You、Zhengchang Xiong、Kui Lu、Reza Fathi、Jiahua Chen、Zhen Yang
DOI:10.1021/jo050498t
日期:2005.7.1
Pd-catalyzed copper-free carbonylative Sonogashira coupling reaction to synthesize alkynyl ketones from terminal alkynes and aryl iodides was achieved by using water as a solvent. The reaction was carried out at room temperature under balloon pressure of CO with Et3N as a base. The developed method was successfully applied to the synthesis of flavones.
Thermal 1,3-dipolar cycloaddition of azomethine imines with alkynes affording N,N-bicyclic pyrazolidinones under microwave irradiation
作者:Zhi-Wei Yang、Jing-Fang Wang、Li-Jie Peng、Xiao-Lin You、Hai-Lei Cui
DOI:10.1016/j.tetlet.2016.10.030
日期:2016.11
A metal and catalyst free 1,3-dipolar cycloaddition reaction of azomethineimines with internal alkynes has been developed. Various N,N-bicyclic pyrazolidinones could be prepared quickly under microwave irradiation in moderate to excellent yields (up to 96%). A wide range of azomethineimines and electron-deficient internal alkynes were applicable to this reaction. In addition, gram-scale reaction
Metal-free one-pot synthesis of benzofurans with ynones and quinones through aza-Michael/Michael/annulation sequence
作者:Hai-Lei Cui、Hui-Qing Deng、Jin-Ju Lei
DOI:10.1016/j.tet.2017.11.014
日期:2017.12
metal-free one-pot synthesis of benzofuran derivatives starting from simple ynones has been developed. Various functionalizedbenzofurans closely related to bioactive molecules can be obtained in moderate to good yields (up to 90%) through aza-Michael/Michael/annulation sequence. Preparative scale synthesis of benzofurans has also been successfully achieved. The application of the benzofuran products has
已经开发了一种方便的无金属一锅合成苯并呋喃衍生物的方法,该方法可从简单的炔酮开始。可以通过aza-Michael / Michael / annulation序列以中等到良好的产率(高达90%)获得与生物活性分子密切相关的各种功能化的苯并呋喃。苯并呋喃的制备规模合成也已成功实现。苯并呋喃产品的应用已通过轻松转化为高度功能化的分子得到了展示,这对药物化学和有机材料化学具有重大的前景。
Synthesis of 4-(Trifluoromethyl)cyclopentenones and 2-(Trifluoromethyl)furans by Reductive Trifluoroacetylation of Ynones
作者:Tianyuan Zhang、Hirofumi Maekawa
DOI:10.1021/acs.orglett.7b03302
日期:2017.12.15
bond formation by magnesium-promoted reduction is ethyl trifluoroacetate, which has been rarely used as a fluorine-containing carbon source, especially to electron-deficient carbon atoms in organic synthesis.
We have developed a mild, convenient and efficient synthesis of highly functionalized (Z)-β-enamino ketones from readily available 3,4-dihydroisoquinoline imines and ynones through an aza-Michael/hydrolysis cascade reaction. This method is also suitable for the preparation of (Z)-β-enamino esters using alkynoates as starting materials. Complex fully substituted pyrroles can be constructed from the