已经开发了一种新型 Pd 催化的N , N - 二烷基取代的邻炔基苯胺的级联反应,涉及吲哚化 / peri -C-H 环化 / N -脱烷基化序列,以构建环五稠合苊[1,2- b ]吲哚 (ANI) 支架。多种具有芳香族烃的围在炔末端-C-H键,如萘,菲,芘,荧蒽和,被雇用,得到相应的π扩展ANI衍生物。ANI 分子通过增加 HOMO 和降低 LUMO 显示出相对窄的能隙,这意味着它们在低带隙材料中作为 π 段的潜在应用。
1,2-Difunctionalization of Aryl Triflates: A Direct and Modular Access to Diversely Functionalized Anilines
作者:Seoyoung Cho、Qiu Wang
DOI:10.1021/acs.orglett.0c00320
日期:2020.2.21
ortho-Amino difunctionalization of aryl triflates has been achieved via a three-component reaction. The cascade reaction proceeds through a zincate base-mediated deprotonative formation of a reactive aryne intermediate, in situ nucleophilic addition, and coupling with electrophilic partners. This strategy leverages the advantageous reactivity of organozincate intermediates, enabling the installation
Palladium-Catalyzed One-Pot Three- or Four-Component Coupling of Aryl Iodides, Alkynes, and Amines through CN Bond Cleavage: Efficient Synthesis of Indole Derivatives
作者:Wei Hao、Weizhi Geng、Wen-Xiong Zhang、Zhenfeng Xi
DOI:10.1002/chem.201304215
日期:2014.2.24
An efficient synthesis of N‐substituted indolederivatives was realized by combining the Pd‐catalyzed one‐pot multicomponent coupling approach with cleavage of the C(sp3)N bonds. Three or four components of aryl iodides, alkynes, and amines were involved in this coupling process. The cyclopentadiene–phosphine ligand showed high efficiency. A variety of aryl iodides, including cyclic and acyclic tertiary
N-取代的吲哚衍生物的有效合成通过Pd催化的一锅多组分耦合方法与C(SP的切割组合实现3)N个债券。该偶联过程涉及芳基碘化物,炔烃和胺的三种或四种组分。环戊二烯-膦配体显示出高效率。可以使用多种芳基碘化物,包括环状和无环叔氨基芳基碘化物,以及取代的1-溴-2-碘代苯衍生物。可以使用被烷基,芳基或三甲基甲硅烷基取代的对称和不对称炔烃。环仲胺(例如哌啶,吗啉,4-甲基哌啶,1-甲基哌嗪,2-甲基哌啶)和无环胺(包括仲胺和伯胺)均显示出良好的反应性。苯并硅氧烷[2,3- b ]吲哚的合成证明了所得吲哚衍生物的进一步应用。
Synthesis of N-alkyl-3-sulfonylindoles and N-alkyl-3-sulfanylindoles by cascade annulation of 2-alkynyl-N,N-dialkylanilines
Divergent synthesis of N-alkyl-3-sulfonylindoles and N-alkyl-3-sulfanylindoles from 2-alkynyl-N,N-dialkylanilines and sulfonyl hydrazides has been described.
A new synthetic approach for the synthesis of indolo[2,3-b]quinolines and benzothieno[2,3-b]quinolines has been developed by employing the freshly prepared o-alkynylisocyanobenzenes derived from o-alkynylformamide derivatives as substrates. The synthetic transformations involved chloride-ion-triggered 6-endo cyclization of o-alkynylisocyanobenzenes to generate 2-chloroquinolines in situ, which further
Iodine-Mediated Intramolecular Dehydrogenative Coupling: Synthesis of <i>N</i>-Alkylindolo[3,2-<i>c</i>]- and -[2,3-<i>c</i>]quinoline Iodides
作者:Prajesh S. Volvoikar、Santosh G. Tilve
DOI:10.1021/acs.orglett.5b03392
日期:2016.3.4
intramolecular dehydrogenative coupling reaction is developed for the synthesis of a library of medicinally important 5,11-dialkylindolo[3,2-c]quinoline salts and 5,7-dimethylindolo[2,3-c]quinoline salts. The annulation reaction is followed by aromatization to yield tetracycles in good yield. This protocol is also demonstrated for the synthesis of the naturally occurring isocryptolepine in salt form.
开发了I 2 / TBHP介导的分子内脱氢偶联反应,用于合成具有医学重要性的5,11-二烷基吲哚并[3,2- c ]喹啉盐和5,7-二甲基吲哚并[2,3- c ]喹啉盐。环化反应后进行芳构化,以高收率得到四环。还证明了该方案可用于合成盐形式的天然存在的异隐油平。