Synthesis of Polycyclic Indolines by Utilizing a Reduction/Cyclization Cascade Reaction
作者:Jingyu Zhang、Wei Xia、Meilin Qu、Saskia Huda、Jas S. Ward、Kari Rissanen、Markus Albrecht
DOI:10.1002/ejoc.202101191
日期:2021.12.7
Facile and versatile protocols for the synthesis of diverse novel polycyclic indolines are presented. The dearomatizing cyclization of indoles (1 and 2) proceeds well under mild conditions. Alkaloids tryptanthrin and phaitanthrin C have been prepared by using this developed protocol.
提出了用于合成各种新型多环二氢吲哚的简便而通用的协议。吲哚(1和2)的脱芳构化环化反应在温和条件下进行。生物碱色氨酸和苯菊酯 C 已通过使用此开发的协议制备。
Synthesis of N‐Fused Indolines via Copper (II)‐Catalyzed Dearomatizing Cyclization of Indoles
作者:Jingyu Zhang、Wei Xia、Saskia Huda、Jas S. Ward、Kari Rissanen、Markus Albrecht
DOI:10.1002/adsc.202100290
日期:2021.6.21
Herein, a copper(II)-catalyzed dearomative cyclization amination of N-(2-aminobenzoyl) indoles is presented. Under mild reaction conditions, the cyclization proceeds to afford tetracyclic indolines by forming a new C−N bond in good yields. The tetracyclic 5a,6-dihydroindolo[2,1-b]quinazolin-12(5H)-ones are obtained in good to excellent yields (up to 99% yield) by using trifluoromethanesulfonic acid
Visible‐Light‐Induced Aerobic Intramolecular Cyclization of (2‐Aminophenyl)(1<i>H</i>‐indol‐1‐yl)methanones: Direct Access to Bioactive Tryptanthrin and its Derivatives
Visible-light-induced mild, transition metal, base, and photocatalyst-free green protocol has been developed for the synthesis of tryptanthrin and its derivatives. The present reaction is compatible with a wide range of substrates with good to high yields. Further, a novel synthetic transformation of tryptanthrin derivatives has been achieved by the decarboxylative addition of cyanoacetic acid for
Silver- and Gold-Mediated Domino Transformation: A Strategy for Synthesizing Benzo[<i>e</i>]indolo[1,2-<i>a</i>]pyrrolo/pyrido[2,1-<i>c</i>][1,4]diazepine-3,9-diones
作者:Yu Zhou、Jian Li、Xun Ji、Wei Zhou、Xu Zhang、Wangke Qian、Hualiang Jiang、Hong Liu
DOI:10.1021/jo101727r
日期:2011.3.4
We reported a strategy for the synthesis of fused heterocyclic compounds benzo[e]indolo[1,2-a]pyrrolo/pyrido[2,1-c][1,4]diazepine-3,9-diones via an AgSbF(6)/gold-complex catalyzed one-pot cascade transformation. The strategy is tolerant of a broad range of substrates and affords a series of intriguing fused diazepinedione heterocycles.
I<sub>2</sub>/TBHP-Catalyzed Chemoselective Amination of Indoles
作者:Zhong-Jian Cai、Shun-Yi Wang、Shun-Jun Ji
DOI:10.1021/ol4023936
日期:2013.10.18
A novel I-2/TBHP-mediated direct oxidative diamination reaction of indoles with anilines was developed. The reaction proceeded smoothly under aqueous and open air reaction conditions. This protocol provides a practical synthetic method for the synthesis of Tryptanthrin and the construction of N-C3 linked pyrrolidinoindolines which is the core structure of Psychotrimine.