Access to π-Extended Heterocycles Containing Pyrrolo-Coumarin Cores Involving −COCH<sub>3</sub>as a Traceless Directing Group and Materializing Two Successive sp<sup>2</sup>C–H/sp<sup>3</sup>N–H and sp<sup>2</sup>C–H/sp<sup>2</sup>N–H Activations
作者:Dwaipayan Das、Asish R. Das
DOI:10.1021/acs.joc.2c00958
日期:2022.9.2
Rh(III)-catalyzed C–H activation reaction starting from 3-acetamidocoumarins and internal alkynes. The isolation of the intermediate pyrrolo-coumarin suggests that the −COCH3 group in acetamidocoumarins performs the role of a traceless directing group. Besides, the use of commercially available [Cp*RhCl2]2 adds more importance as no additional modification of the catalyst is required. A two-step protocol bearing
An Efficient One-Pot Synthesis of Pyrido[2,3-<i>c</i>]coumarins via Serial Catalysis and Its Application in Concise Formal Synthesis of Santiagonamine
作者:San Kim、Young Taek Han
DOI:10.1021/acs.joc.3c01654
日期:2023.11.3
high-yielding one-pot synthesis of polysubstituted pyrido[2,3-c]coumarins from N-Boc-N-coumarinyl propargylamine derivatives was achieved via serial catalysis using AgSbF6. Using this approach, the concise formal synthesis of santiagonamine was successfully accomplished. This simple and versatile method could be used to increase the potential of the pyrido[2,3-c]coumarin scaffold for diverse synthetic and
使用AgSbF 6通过串联催化,从N -Boc- N-香豆素基炔丙胺衍生物中多功能、高产率地一锅合成多取代吡啶并[2,3- c ]香豆素。利用该方法,成功完成了圣地亚哥胺的简明形式合成。这种简单且通用的方法可用于增加吡啶并[2,3- c ]香豆素支架在各种合成和生物应用中的潜力。
Hydrolysis-free synthesis of 3-aminocoumarins
作者:Amit A. Kudale、Jamie Kendall、C. Chad Warford、Natasha D. Wilkins、Graham J. Bodwell
DOI:10.1016/j.tetlet.2007.05.088
日期:2007.7
A commonly encountered problem in the synthesis of 3-aminocoumarins is the formation of 3-hydroxycoumarins. A solution to this problem, which involves non-aqueous formation of the 3-aminocoumarin system, is described.