diastereo- and enantioselective BOX/Cu(II)-catalyzed C2,C3-cyclopentannulation of indoles with donor-acceptor cyclopropanes has been developed on the basis of asymmetric formal [3 + 2] cycloaddition of indoles. This reaction provides rapid and facile access to a series of enantioenriched cyclopenta-fused indoline products and can be further extended to the construction of tetracyclic pyrroloindolines. The synthetic
Multicomponent Assembly of Highly Substituted Indoles by Dual Palladium-Catalyzed Coupling Reactions
作者:John M. Knapp、Jie S. Zhu、Dean J. Tantillo、Mark J. Kurth
DOI:10.1002/anie.201204633
日期:2012.10.15
Highly substituted indoles were synthesized by a palladium‐catalyzed reaction involving three independent components in a one‐pot reaction. Two distinct palladium‐catalyzed coupling reactions occur with a single catalytic system: a Buchwald‐Hartwig reaction and an arene‐alkene coupling. Quantum chemical computations provide insight into the mechanism of the latter coupling step.
Domino Ring-Opening Cyclization of Activated Aziridines with Indoles: Synthesis of Chiral Hexahydropyrroloindoles
作者:Abhijit Mal、Masthanvali Sayyad、Imtiyaz Ahmad Wani、Manas K. Ghorai
DOI:10.1021/acs.joc.6b01731
日期:2017.1.6
A highly enantioselective syntheticroute to hexahydropyrrolo[2,3-b]indoles via Lewis acid-catalyzed SN2-type ringopening of activatedaziridines with indoles having substitutions at 3- and other positions followed by cyclization in a domino fashion has been developed. Hexahydropyrrolo[2,3-b]indoles have been detosylated in the same pot to afford the corresponding products with free NH group in excellent
通过路易斯酸催化的活化氮丙啶的S N 2型开环反应,在吲哚在3-位和其他位置具有取代基,然后以多米诺方式环化,已开发出高度对映选择性的合成路线,以合成六氢吡咯并[2,3- b ]吲哚。六氢吡咯并[2,3- b ]吲哚已在同一罐中进行了甲苯磺酸化,以优异的收率(高达95%)和对映选择性(高达> 99%)提供了具有游离NH基团的相应产品。
Dearomative (3 + 2) Cycloaddition of Indoles for the Stereoselective Assembly of Fully Functionalized Cyclopentanoids
作者:Amjad Ayad Qatran Al-Khdhairawi、Tengrui Yuan、Kristof Van Hecke、Johan M. Winne
DOI:10.1021/acs.orglett.4c01139
日期:2024.5.17
The gold(I)-catalyzed dearomative cyclopentannulation of various indoles with 2-ethynyl-1,3-dithiolane is reported. The method generates three new stereocenters with excellent control of relative stereochemistry and is tolerant of diverse functionalization and substitution patterns on the indoles. The obtained cyclopentane-fused indolines allow for interesting subsequent synthetic manipulations, giving
A Pd-catalyzed enantiospecific formal [3 + 2] cycloaddition between chiral aziridines and indoles has been developed. With this method, chiral pyrroloindolines in enantiomerically pure forms were constructed in high yields and diastereoselectivities under mild conditions.