Regiochemical Switching in Diels−Alder Cycloadditions by Change in Oxidation State of Removable Diene Sulfur Substituents. Synthesis of Carbazoles by Sequential Heteroannulation and Diels−Alder Cycloaddition
作者:Thomas G. Back、Aleksandra Pandyra、Jeremy E. Wulff
DOI:10.1021/jo0268714
日期:2003.4.1
which were oxidized with DDQ to produce vinylogous 2-(phenylthio)indoles 8. The latter compounds underwent highly regioselective Diels-Alder cycloadditions with methylpropiolate in the presence of MeAlCl(2) or AlCl(3), with simultaneous elimination of benzenethiol, to afford methyl N-(carbobenzyloxy)carbazole-3-carboxylates 9 and, in some cases, the N-deprotected derivatives 11. This is the opposite
Copper‐Catalyzed One‐Pot Arylation and Cyclization of Diaryliodonium Salts Derived from
<i>o</i>
‐Iodoanilines for Indolo[2,3‐
<i>b</i>
]indoles Syntheses
作者:Miseon Choi、Manish Kumar Mehra、Chung Whan Lee
DOI:10.1002/ejoc.202201286
日期:2023.1.24
A one-pot strategy to access indoloindoles with wide scope and good functional group tolerance fromdiaryliodoniumsalts is described.
描述了一种从二芳基碘盐中获得具有广泛范围和良好官能团耐受性的吲哚并吲哚的一锅法策略。
Preparation of vinylogous 2-sulfonylindolines by the palladium-catalyzed cyclization of 1-sulfonyl-1,3-dienes with N-Cbz-o-Iodoanilines
作者:Thomas G. Back、Richard J. Bethell
DOI:10.1016/s0040-4039(98)01111-3
日期:1998.7
N-Cbz-o-Iodoanilines undergo Pd(OAc)(2)-catalyzed coupling and cyclization with 1(-p-toluenesulfonyl)-1,3-dienes to afford 2-(2- p-toluenesulfonylvinyl)indolines under mild conditions. (C) 1998 Elsevier Science Ltd. All rights reserved.
Preparation of Vinylogous 2-Sulfonylindolines by the Palladium-Catalyzed Heteroannulation of <i>o</i>-Iodoanilines with Dienyl Sulfones and Their Further Transformation to Indoles and Carbazoles
作者:Thomas G. Back、Richard J. Bethell、Masood Parvez、Jerry A. Taylor
DOI:10.1021/jo016080m
日期:2001.12.1
employed as dienes in Diels-Alder reactions with dimethyl acetylenedicarboxylate (DMAD), methyl propiolate, or methyl acrylate. In the case of the latter two dienophiles, the cycloadditions were highly regioselective, affording the corresponding 1,3-products (with respect to the relative positions of the sulfone and ester groups), exclusively. The cycloadducts from acetylenic dienophiles were converted to