已经开发了通过正式的脱氢-狄尔斯-阿尔德反应的金催化的炔基-炔烃环异构化反应,为各种取代的苯并[ b ]咔唑提供了诱人的途径。该反应可能是通过炔烃侧基区域选择性地攻击酮亚胺离子中间体并随后进行苯环化而进行的。该方法具有许多优点,例如高效,温和的反应条件和宽泛的官能团耐受性,可作为对乙酰胺炔炔的热DDA反应的高度有用的补充。
Tandem Synthesis of Benzo[<i>b</i>]carbazoles and Their Photoluminescent Properties
作者:Yanpeng Xing、Binbin Hu、Qijun Yao、Ping Lu、Yanguang Wang
DOI:10.1002/chem.201301887
日期:2013.9.16
5 H‐Benzo[b]carbazoles were prepared through a tandem reaction between 2‐ethynyl‐N‐triphenylphosphoranylidene anilines and α‐diazoketones through ketenimine intermediates in moderate‐to‐good yields. By using this approach, benzo[b]benzo[5,6]indolo[3,2‐h]carbazoles, fluoreno[9,1‐ab]carbazoles, and fluoreno[9,1‐ab]fluoreno[1′,9′:5,6,7]indolo[3,2‐h]carbazoles were constructed in one pot. Moreover, the
通过2-乙炔基-N-三苯基磷酰亚苯胺苯胺和α-二氮酮通过酮亚胺中间体的串联反应,以中等至良好的产率制备了5 H-苯并[ b ]咔唑。通过使用这种方法,苯并[ b ]苯并[5,6]吲哚并[3,2- h ]咔唑,芴[9,1- ab ]咔唑和芴[9,1- ab ]氟[1',9 ′:5,6,7] indolo [3,2- h ]咔唑是在一个锅中制成的。而且,最终产物发出的光在410-521 nm范围内,量子产率高达62%。
Generation of Biradicals and Subsequent Formation of Quinolines and 5<i>H</i>-Benzo[<i>b</i>]carbazoles from <i>N</i>-[2-(1-Alkynyl)phenyl]ketenimines
作者:Chongsheng Shi、Kung K. Wang
DOI:10.1021/jo9804285
日期:1998.5.1
Brønsted Acid-Catalyzed Straightforward Synthesis of Benzo[<i>b</i>]carbazoles from 2,3-Unsubstituted Indoles
作者:Anisley Suárez、Patricia García-García、Manuel A. Fernández-Rodríguez、Roberto Sanz
DOI:10.1002/adsc.201300868
日期:2014.2.10
AbstractDescribed is a general and efficient synthesis of valuable benzo[b]carbazoles by Brønsted acid‐catalyzed reactions between simple C‐2,C‐3‐unsubstituted indoles and ortho‐[α‐(hydroxy)benzyl]benzaldehyde acetals. Highly selective migration processes are involved as key steps in the overall cascade sequence that involves the one‐pot formation of two new bonds and a cycle in a regioselective fashion.magnified image
Synthesis of Ellipticine: A Radical Cascade Protocol to Aryl- and Heteroaryl-Annulated[<i>b</i>]carbazoles
作者:Jan M. Pedersen、W. Russell Bowman、Mark R. J. Elsegood、Anthony J. Fletcher、Peter J. Lovell
DOI:10.1021/jo0519920
日期:2005.12.1
Imidoyl selanides, synthesized from amides, have been used as radical precursors of imidoyl radicals in cascade reactions. The novel radical cascade has been developed for the simple synthesis of the medicinally important aryl-annulated[b]-carbazoles. The protocol has been exemplified with the high-yielding total synthesis of the anticancer alkaloid ellipticine.