Apparent Carbon Monoxide Insertion<i>via</i>Double Isocyanide Incorporation during Palladium-Catalyzed Construction of Indoloquinoline Ring in a Single Pot: Synthesis of New Cytotoxic Agents
isocyanide units during a palladium‐catalyzed construction of the indoloquinoline ring afforded N‐substituted 6H‐indolo[2,3‐b]quinoline‐11‐carboxamides as new cytotoxic agents. The solvent and base play a key role in the selective and unprecedented synthesis of this class of amides.
在吲哚喹啉环的钯催化构建过程中通过结合两个异氰酸酯单元形成酰胺键,从而提供了N-取代的6 H-吲哚并[2,3 - b ]喹啉-11-羧酰胺作为新的细胞毒性剂。溶剂和碱在此类酰胺的选择性和空前的合成中起关键作用。
Silver-catalyzed synthesis of 4-substituted benzofurans<i>via</i> a cascade oxidative coupling-annulation protocol
作者:Yang Ye、Renhua Fan
DOI:10.1039/c1cc10137d
日期:——
A facile synthesis of 4-indole benzofurans via an oxidative dearomatization, a silver-catalyzed cascade Michael addition-annulation, and an aromatization is reported.
通过氧化脱芳构建的银催化级联迈克尔加成-环化和芳香化,报告了一种简便的4-吲哚苯并呋喃合成。
Cu(I)-Catalyzed Enantioselective Friedel–Crafts Alkylation of Indoles with 2-Aryl-<i>N</i>-sulfonylaziridines as Alkylating Agents
作者:Chen Ge、Ren-Rong Liu、Jian-Rong Gao、Yi-Xia Jia
DOI:10.1021/acs.orglett.6b01317
日期:2016.7.1
A highlyenantioselectiveFriedel–Craftsalkylation of indoles with N-sulfonylaziridines as alkylating agents has been developed by utilizing the complex of Cu(CH3CN)4BF4/(S)-Segphos as a catalyst. A range of optically active tryptamine derivatives are obtained in good to excellent yields and enantioselectivities (up to >99% ee) via a kinetic resolution process.
Photochemically Mediated Ring Expansion of Indoles and Pyrroles with Chlorodiazirines: Synthetic Methodology and Thermal Hazard Assessment
作者:Ben W. Joynson、Graham R. Cumming、Liam T. Ball
DOI:10.1002/anie.202305081
日期:2023.8
demonstrate that pyridinium and quinolinium salts can be accessed by the insertion of a single C-atom from an arylchlorodiazirine into the parent N-alkyl pyrrole or indole. The azinium products of ringexpansion are activated towards oxygenation and hydrogenation, expediting further structural diversification. Safer methods for the use of diazirines as carbene precursors have been developed with insight
我们证明,吡啶盐和喹啉盐可以通过将芳基氯二嗪中的单个 C 原子插入母体 N-烷基吡咯或吲哚来获得。扩环的氮化产物被激活,进行氧化和氢化,加速了进一步的结构多样化。利用差示扫描量热法的洞察力,已经开发了使用二嗪嗪作为卡宾前体的更安全的方法。
strategy for the synthesis of fused carbazoles is developed using indolyl β-ketonitrile in a cascade manner. The reaction sequence involves aryne-mediated [2 + 2] cycloaddition cleavage and intramolecular Michael addition, followed by oxidation under transition-metal-free reaction conditions. Subsequently, conversion of benzo[b]carbazole-6-carbonitrile to carbazole quinone is observed upon prolongation
使用吲哚基β-酮腈以级联方式开发了合成稠合咔唑的芳炔环化策略。反应顺序涉及芳基介导的[2 + 2]环加成裂解和分子内迈克尔加成,然后在无过渡金属的反应条件下进行氧化。随后,随着反应时间的延长,观察到苯并[ b ]咔唑-6-甲腈转化为咔唑醌。此外,这些材料表现出高量子效率,促进了发光二极管的应用。