Simple indole alkaloids and those with a nonrearranged monoterpenoid unit

M Ishikura, T Abe, T Choshi, S Hibino - Natural product reports, 2015 - pubs.rsc.org
Covering: 2012 to 2013. Previous review: Nat. Prod. Rep., 2013, 30, 694–752 This review
covers the literature on simple indole alkaloids and those with a nonrearranged …

Advancements in the synthesis of fused tetracyclic quinoline derivatives

RA Mekheimer, MA Al-Sheikh, HY Medrasi… - RSC advances, 2020 - pubs.rsc.org
Fused tetracyclic systems containing a quinoline nucleus represent an important class of
heterocyclic bioactive natural products and pharmaceuticals because of their significant and …

Formal One Carbon Deletion of Indoline Hemiaminals under Tautomeric Control to Access 2-Aminobenzyl Compounds

K Tokushige, T Abe - The Journal of Organic Chemistry, 2024 - ACS Publications
Unprecedented tert-BuOK-mediated one carbon deletion of indoline hemiaminals has been
achieved. This novel protocol provides an efficient synthetic tool for the construction of 2 …

Iodine-Mediated Intramolecular Dehydrogenative Coupling: Synthesis of N-Alkylindolo[3,2-c]- and -[2,3-c]quinoline Iodides

PS Volvoikar, SG Tilve - Organic letters, 2016 - ACS Publications
An I2/TBHP-mediated intramolecular dehydrogenative coupling reaction is developed for
the synthesis of a library of medicinally important 5, 11-dialkylindolo [3, 2-c] quinoline salts …

Neocryptolepine (cryprotackieine), a unique bioactive natural product: Isolation, synthesis, and profile of its biological activity

ABJ Bracca, DA Heredia, EL Larghi… - European Journal of …, 2014 - Wiley Online Library
The widely varying different approaches to the total synthesis of the indoloquinoline alkaloid
neocryptolepine are discussed. Aspects relating to the isolation of the natural product from …

Synthesis of 6-Substituted 6H-Indolo[2,3-b]quinolines from Isoindigos

L Fan, M Liu, Y Ye, G Yin - Organic letters, 2017 - ACS Publications
A facile approach to 6-aryl/alkyl substituted 6 H-indolo [2, 3-b] quinolines from mono-N-
substituted isoindigo derivatives in the presence of SnCl2· 2H2O in acid media is described …

Methods of synthesis of natural indoloquinolines isolated from Cryptolepis sanguinolenta

ON Nadein, DА Aksenov, GM Abakarov… - Chemistry of …, 2019 - Springer
The review summarizes the approaches to the synthesis of natural biologically active
indoloquinoline systems isolated from Cryptolepis sanguinolenta published over the past …

Efficient total synthesis of neocryptolepine and synthetic access to 6-methylquinindoline from a common intermediate

MV Méndez, DA Heredia, EL Larghi, ABJ Bracca… - RSC …, 2017 - pubs.rsc.org
A convenient approach toward the indoloquinolines neocryptolepine and 6-
methylquinindoline from a common intermediate, is reported. Both sequences, designed for …

Indoloquinolines: possible biogenesis from common indole precursors and their synthesis using domino strategies

PT Parvatkar, PS Parameswaran - Current Organic Synthesis, 2016 - ingentaconnect.com
The tetracyclic indoloquinoline alkaloids, cryptolepine, neocryptolepine, isocryptolepine and
their analogues, isolated from the West African shrub Cryptolepis sanguinolenta are known …

One-pot access to 11-methyl-6 H-indolo [2, 3-b] quinolines via iodine-mediated annulation of indoles with 2-vinylanilines and evaluation of their biological activities

J Yan, Z Fang, J Su, Q He, N Al-Maharik… - Organic Chemistry …, 2023 - pubs.rsc.org
A simple, straightforward and efficient method for the synthesis of a series of 11-methyl-6H-
indolo [2, 3-b] quinolines bearing different substituents on the indole and quinoline rings is …