Ir(I)-Catalyzed C–H Bond Alkylation of C2-Position of Indole with Alkenes: Selective Synthesis of Linear or Branched 2-Alkylindoles
摘要:
A cationic iridium-catalyzed C2-alkylation of N-substituted indole derivatives with various alkenes has been developed, which selectively gives linear or branched 2-alkylindoles in high to excellent selectivity. This protocol relies on the use of the carbonyl group on the nitrogen atom of indole as a directing group: a linear product was predominant when an acetyl group was used as a directing group, and a branched product was predominant with a benzoyl group.
Provided herein, inter alia, are compounds and methods for treating cancer.
在此提供的,包括但不限于,用于治疗癌症的化合物和方法。
γ-Carboline synthesis enabled by Rh(<scp>iii</scp>)-catalysed regioselective C–H annulation
作者:Bo Jiang、Jingwen Jia、Yufei Sun、Yichun Wang、Jing Zeng、Xiubin Bu、Liangliang Shi、Xiaoying Sun、Xiaobo Yang
DOI:10.1039/d0cc04740f
日期:——
A Rh(iii)-catalysed C–H annulation of indolyl oximes with alkynyl silanes was developed, delivering diverse γ-carbolines with unexpected reverse regioselectivity.
Carbon dioxide: A reagent for the protection of nucleophilic centres and the simultaneous activation of alternative locations to electrophilic attack.
作者:Alan R. Katritzky、Kunihiko Akutagawa
DOI:10.1016/s0040-4039(00)98265-0
日期:1985.1
derivatives by using carbondioxide both for N-protection and to give an intermediate carbanion stabilizing group. t-Butyllithium was used as a lithiating agent at the alpha-carbon atom of the indole enamino group. The resulting 2-substituted indole-1-carboxylic acids underwent smooth thermal decarboxylation under mild conditions. Alternatively, with longer reaction times the protecting group is lost during
An efficient and concise total synthesis of the antimalarial alkaloid quindoline
作者:Dayse dos S. Bastos、Anna C. Silva、André L.M. Albert、Wesley M.R. Barros、Glaucia B.C.A. Slana、Jari N. Cardoso、Rosangela S.C. Lopes、Claudio C. Lopes
DOI:10.1016/j.tetlet.2013.04.010
日期:2013.6
The preparation of the alkaloid quindoline (1) from indol (3) through a very direct synthetic approach is described in this work. Several successive heteroaromatic lithiation reaction steps were performed in the same medium producing benzylic alcohol (7) in excellent yield. The alcohol was submitted to catalytic reduction, undergoing concomitant cyclization and aromatization, yielding quindoline (1)
Stereocontrolled Synthesis of Heterocyclic C-Nucleosides. Protecting Group Effect and Molecular Modeling Studies
作者:Dominique Guianvarc'h、Jean-Louis Fourrey、Marie-Elise Tran Huu Dau、Vincent Guérineau、Rachid Benhida
DOI:10.1021/jo016345x
日期:2002.5.1
We report herein a short stereocontrolledsynthesis of heterocyclic C-nucleosides (indole, imidazole, benzimidazole, and 6-iodobenzimidazole). First, condensation of 2-lithiated heterocycles 2-5 with 5-(tert-butyldiphenylsilyl)-2,3-O-isopropylidene-D-gamma-ribonolactone (1) afforded the hemiacetals 6-9 in good yields. Then, borohydride reduction (NaBH(4)) of the protected hemiacetals proceeded stereoselectively