Copper-Catalyzed Cyclization of Iodo-tryptophans: A Straightforward Synthesis of Pyrroloindoles
摘要:
Pyrroloindoles are a key structural motif found in a wide number of biologically active alkaloids. Intramolecular copper-catalyzed coupling of readily accessible 2-iodo-tryptophan derivatives occurs in excellent yield, affording a wide range of polysubstituted, enantioenriched tetrahydropyrrolo[2,3-b]indoles. Diketopiperazines are also suitable substrates for this cyclization reaction, which affords a straightforward entry to tetra- to hepta-polycyclic systems.
Easy access to drug building-blocks through benzylic C–H functionalization of phenolic ethers by photoredox catalysis
作者:Tobias Brandhofer、Martin Stinglhamer、Volker Derdau、María Méndez、Christoph Pöverlein、Olga García Mancheño
DOI:10.1039/d1cc01756j
日期:——
A visible light-mediated photocatalyzed C–C-bond forming method for the benzylic C–H functionalization of phenolether containing synthetic building blocks based on a radical-cation/deprotonation strategy is reported. This method allows the mild, selective generation of benzyl radicals in phenolic complex molecules and drug-like compounds, providing new entries in synthetic and medicinal chemistry.
报道了一种基于自由基阳离子/去质子化策略的可见光介导的光催化 C - C 键形成方法,用于含合成结构单元的苯酚醚的苄基 C-H 官能化。该方法允许在酚类复合物分子和类药物化合物中温和、选择性地生成苄基,为合成和药物化学提供了新的入口。
Efficient <i>N</i>-<i>tert</i>-Butoxycarbonylation of Indoles with Di-<i>tert</i>-butyl Dicarbonate Catalyzed by Cesium Fluoride
作者:Tsuneo Sato、Nobuyuki Inahashi、Ayako Matsumiya
DOI:10.1055/s-2007-1000869
日期:2008.1
An environmentally friendly process for the TERT-butoxycarbonylation of indoles with di- TERT-butyl dicarbonate has been developed. Catalytic amount of cesiumfluoride can accelerate this TERT-butoxycarbonylation.
A method for the synthesis of C3a acetoxy hexahydropyrrolo[2,3-b]indole derivatives via a PhI(OAc)2/nBu4NI mediated tandem iodocyclization/acetoxylation has been developed. The newly developed synthetic strategy features the single-step assembly of various C3a acetoxylated tetrahydropyrrole-, tetrahydrofuran-, and lactone-fused indolines under mild reaction conditions, which enabled efficient asymmetric
已经开发了一种通过PhI(OAc) 2 / n Bu 4 NI 介导的串联碘环化/乙酰氧基化合成C3a乙酰氧基六氢吡咯并[2,3- b ]吲哚衍生物的方法。新开发的合成策略的特点是在温和的反应条件下单步组装各种 C3a 乙酰氧基化四氢吡咯、四氢呋喃和内酯稠合的二氢吲哚,从而能够有效地不对称合成 (-)-protubonine B。
Photoredox C(2)-Arylation of Indole- and Tryptophan-Containing Biomolecules
作者:Bruno M. da S. Santos、Fernanda G. Finelli、David R. Spring
DOI:10.1021/acs.orglett.4c01019
日期:2024.5.17
methodology for photoredox arylation of an indole scaffold using aryldiazonium salts under mild and metal-free conditions. Our approach enables the regioselective and chemoselective introduction of several aryl groups to the C(2) position of indoles and tryptophan, even in competition with other amino acids. This approach extends to the late-stage functionalization of peptides and lysozyme, heralding