Syntheses of 6,12-disubstituted 5,11-dihydroindolo[3,2-b]carbazoles, including 5,11-dihydroindolo[3,2-b]carbazole-6,12-dicarbaldehyde, an extremely efficient ligand for the TCDD (Ah) receptor
作者:Joakim Tholander、Jan Bergman
DOI:10.1016/s0040-4020(99)00733-4
日期:1999.10
6,12-disubstituted 5,11-dihydroindolo[3,2-b]carbazoles have been synthesized via a range of methods: a) double Fischer indolization of the bis-phenylhydrazone of 2,5-dimethyl-1,4-cyclohexanedione, b) condensation of indole with aliphatic aldehydes, and c) Pd-mediated cyclization of a diphenyl phenylenediamine derivative. Most notably, 5,11-dihydroindolo[3,2-b]carbazole-6,12-dicarbaldehyde has been
通过一系列方法合成了对称和不对称的6,12-二取代的5,11-二氢吲哚并[3,2- b ]咔唑:a)2,5-二甲基-1,4的双-苯基hydr的双费歇尔吲哚化-环己二酮,b)吲哚与脂族醛的缩合,和c)Pd介导的二苯基苯二胺衍生物的环化。最显着地,已经合成了5,11-二氢吲哚并[3,2- b ]咔唑-6,12-二甲醛,由此证实了先前指定的结构。该化合物是TCDD(Ah)受体的极其有效的配体。
[1 + 2 + 3] Annulation as a General Access to Indolo[3,2-<i>b</i>]carbazoles: Synthesis of Malasseziazole C
A formal [1 + 2 + 3] annulation of methyleneindolinones with o-alkenyl arylisocyanides has been developed for the general and efficient synthesis of both symmetrical and unsymmetrical indolo[3,2-b]carbazoles. The chemoselectivity of this domino reaction was tuned by a tethered alkenyl group, which enables successive formation of three new bonds and two rings from readily accessible starting materials
已开发了一种亚甲基吲哚酮与邻链烯基芳基异氰酸酯的正式[1 + 2 + 3]环合结构,用于对称和不对称的吲哚[3,2- b ]咔唑的常规合成。该多米诺反应的化学选择性通过束缚链烯基进行调节,该链烯基能够在一次操作中由易于接近的起始原料连续形成三个新键和两个环。此外,该方法被用作生物碱麦拉西唑C合成中的关键步骤。
Palladium-Catalyzed Approach to Malasseziazole A and First Total Synthesis of Malasseziazole C
作者:Hans-Joachim Knölker、Ute Kober
DOI:10.1055/s-0034-1380713
日期:——
We describe a convergent route to 5,11-dihydroindolo[3,2-b]carbazoles using a twofold oxidative cyclization as key step. The method has been applied to the synthesis of a precursor for malasseziazole A and to the first total synthesis of malasseziazole C.