Visible‐Light‐Catalyzed Formal [3+2] Annulation‐Aromatization of Amidines with Isoquinolinium <i>N</i>‐Ylides: Access to Imidazo[2,1‐<i>a</i>]isoquinolines
A visible-light-catalyzed formal [3+2] annulation-aromatization reaction for the synthesis of various substituted imidazo[2,1-a]isoquinolines from amidines with stabilized isoquinolinium N-ylides in the presence of bases is developed. The procedure reported here involves a direct C−H activation and the formation of C−C/C−N bonds in one-pot. The reaction mechanism is probed by radical-trapping experiment
开发了一种可见光催化的形式[3+2]环化-芳构化反应,用于在碱存在下从脒与稳定的异喹啉鎓N-叶立德合成各种取代的咪唑并[2,1- a ]异喹啉。这里报道的过程涉及直接的 C−H 激活和一锅法中 C−C/C−N 键的形成。通过自由基捕获实验、荧光猝灭和光开关实验探讨了反应机理。后期修饰实验为化学家在有机化学和药物化学领域提供了潜在的应用。
Imidazo[1,2-A]pyridine-3-carboxylate derivative and preparation method thereof
申请人:KNU-INDUSTRY COOPERATION FOUNDATION
公开号:US10323033B2
公开(公告)日:2019-06-18
Provided are an imidazo[1,2-a]pyridine-3-carboxylate derivative and a preparation method thereof, and more particularly, a method of effectively preparing an imidazo[1,2-a]pyridine-3-carboxylate derivative by performing an aza-[3+2] cycloaddition reaction of a pyridine derivative with an α-diazo oxime ether derivative in the presence of a copper (II) catalyst, and an imidazo[1,2-a]pyridine-3-carboxylate derivative prepared thereby.
KUZMENKO T. A.; KUZMENKO V. V.; SIMONOV A. M.; SIMKIN B. YA., XIMIYA GETEROTSIKL. SOEDIN., 1980, HO 12, 1656-1661
作者:KUZMENKO T. A.、 KUZMENKO V. V.、 SIMONOV A. M.、 SIMKIN B. YA.
DOI:——
日期:——
IMIDAZO[1,2-A]PYRIDINE-3-CARBOXYLATE DERIVATIVE AND PREPARATION METHOD THEREOF
申请人:KNU-INDUSTRY COOPERATION FOUNDATION
公开号:US20180354948A1
公开(公告)日:2018-12-13
Provided are an imidazo[1,2-a]pyridine-3-carboxylate derivative and a preparation method thereof, and more particularly, a method of effectively preparing an imidazo[1,2-a]pyridine-3-carboxylate derivative by performing an aza-[3+2] cycloaddition reaction of a pyridine derivative with an α-diazo oxime ether derivative in the presence of a copper (II) catalyst, and an imidazo[1,2-a]pyridine-3-carboxylate derivative prepared thereby.