Synthesis of <i>N</i>-Fused Polycyclic Indoles via Ligand-Free Palladium-Catalyzed Annulation/Acyl Migration Reaction
作者:Zhan Dong、Xiao-Wen Zhang、Weishuang Li、Zi-Meng Li、Wen-Yan Wang、Yan Zhang、Wei Liu、Wen-Bo Liu
DOI:10.1021/acs.orglett.8b04128
日期:2019.2.15
An efficient synthesis of N-fused polycyclic indoles by a palladium-catalyzed annulation/acylmigration cascade reaction is described. The reaction is ligand-free, scalable, and provides access to a diverse range of useful indole scaffolds from readily available starting materials. Supporting mechanistic studies indicate that the reaction likely proceeds via an intramolecular α-arylation mechanism
Dirhodium(II) Carboxylate Catalyzed Formation of 1,2,3-Trisubstituted Indoles from Styryl Azides
作者:Crystalann Jones、Quyen Nguyen、Tom G. Driver
DOI:10.1002/anie.201308611
日期:2014.1.13
Dirhodium(II)‐carboxylate complexes were discovered to promote the selective migration of acyl groups in trisubstituted styryl azides to form 1,2,3‐trisubstituted indoles. The styryl azides are readily available in three steps from cyclobutanone and 2‐iodoaniline.
Rhodium(III)-Catalyzed Intramolecular Redox-Neutral Annulation of Tethered Alkynes: Formal Total Synthesis of (±)-Goniomitine
作者:Bing Zhou、Juanjuan Du、Yaxi Yang、Yuanchao Li
DOI:10.1002/chem.201403973
日期:2014.9.26
A RhIII‐catalyzed intramolecular redox‐neutral atom‐economic annulation of a tethered alkyne has been developed to efficiently construct 2‐amidealkyl indoles with completely reversed regioselectivity by a CHactivation pathway. Furthermore, using the RhIII‐catalyzedCHactivation/annulation as a key step, a one‐pot synthesis of pyrido[1,2‐a]indoles has also been developed and applied to a highly
Cu-Catalyzed Arylation/Acyl Migration Cascade Reaction of Enaminones: Access to N-Fused Polycyclic and 2,3-Disubstituted Indoles
作者:Weishuang Li、Zhan Dong、Yan Zhang、Zhen Zeng、Muhammad Usman、Wen-Bo Liu
DOI:10.1021/acs.joc.9b00866
日期:2019.6.21
polycyclic and 2,3-disubstitutedindoles by copper-catalyzed direct annulation/acyl migration reaction of enaminones is reported. This strategy features cheap and low loading of the catalyst/ligand, readily available starting materials, and good functional group compatibilities. Notably, allyl-containing substrates are also tolerated, which allows the downstream derivatization toward indole alkaloids.
Indole aus cyclischen 1.3-Dicarbonylverbindungen mit substituierter 2-Stellung
作者:Hans-Joachim Teuber、Ernst Worbs、Dieter Cornelius
DOI:10.1002/ardp.19823150503
日期:——
Phenylhydrazone von in 2‐Stellung alkylierten Cyclohexan‐1.3‐dionen 1b–g und 11 reagieren unter den Bedingungen der Fischerschen Indol‐Synthese unter β‐Dicarbonylspaltung und Lactamringschluß zu den Pyrido[1.2‐a]indolen 6b–g und 12. Dies gilt auch für einschlägige heterocyclische Verbindungen 13→14. Die den Lactamen entsprechenden Carbonsäuren vom Typ 5 werden nicht gefaßt, auch nicht bei der Synthesevon 6b und