243-38-9Relevant articles and documents
An improved synthesis of neocryptolepine
Engqvist, Robert,Bergman, Jan
, p. 386 - 390 (2004)
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Microwave-induced bismuth(III)-catalyzed synthesis of linear indoloquinolines
Parvatkar, Prakash T.,Parameswaran,Bandyopadhyay, Debasish,Mukherjee, Sanghamitra,Banik, Bimal K.
, p. 2948 - 2951 (2017)
Microwave-induced Bi(NO3)3-catalyzed one-pot synthesis of a series of linear indoloquinolines is accomplished under mild reaction conditions. While majority of these examples were carried out under solvent-free conditions, in a few cases, minimal quantity of THF is used as solvent. The methodology involves several unique reaction pathways, providing different linear indolo[2,3-b]quinolines in good yields from readily available starting materials and using environmentally benign Bi(NO3)3·5H2O as catalyst.
N-Bromosuccinimide as an efficient catalyst for the synthesis of indolo[2,3-b]quinolines
Ghorbani-Vaghei, Ramin,Malaekehpoor, Seyedeh Mina
, p. 4751 - 4753 (2012)
The use of N-bromosuccinimide as a catalyst promoted the synthesis of polycyclic indolo[2,3-b]quinoline derivatives in good to high yields in the reactions of various aryl amines with indole-3-carbaldehyde at room temperature under mild conditions.
Tandem Rh(III)-Catalyzed C-H Amination/Annulation Reactions: Synthesis of Indoloquinoline Derivatives in Water
Shi, Liangliang,Wang, Baiquan
, p. 2820 - 2823 (2016)
An efficient Rh(III)-catalyzed synthetic method for indoloquinoline derivatives from readily available indoles and isoxazoles was developed. This annulation procedure undergoes tandem C-H activation, cyclization, and condensation steps. In this domino cyclization reaction, water is an efficient solvent. A catalytically competent five-membered rhodacycle has been isolated and characterized, thus revealing a key intermediate in the catalytic cycle.
Synthetic studies towards benzofuro[2,3-b]quinoline and 6H-indolo[2,3-b]quinoline cores: Total synthesis of norneocryptolepine and neocryptolepine
Aksenov, Alexander V.,Aksenov, Dmitrii A.,Aksenov, Nicolai A.,Arutyunov, Nikolai A.,Gasanova, Amina Z.,Lower, Carolyn,Rubin, Michael
, (2021/09/14)
An innovative acid-assisted cascade transformation of indoles with 2-nitrostyrenes was developed, allowing for the one-pot assembly of heterocyclic scaffolds with four fused rings. This strategy was subsequently employed for the concise total synthesis of two natural products, the alkaloids norneocryptolepine and neocryptolepine.
Acid mediated coupling of aliphatic amines and nitrosoarenes to indoles
Roy, Subhra Kanti,Purkait, Anisha,Aziz, Sk Md Tarik,Jana, Chandan K.
supporting information, p. 3167 - 3170 (2020/03/23)
Traditionally, amines react with nitrosoarenes to provide the corresponding imines or azo compounds. Herein, we report an acid mediated annulation reaction of aliphatic amines and nitrosoarenes to provide indole derivatives. The elusive direct annulation of aliphatic amines and nitrosoarenes via simultaneous C-C and C-N bond formation was achieved under metal free conditions. This conceptually novel method for indole synthesis does not require pre-functionalization steps for the new C-C and C-N bond formation. The method has been applied for an elegant synthesis of nor-neocryptolepine and neocryptolepine.
Palladium-Catalyzed Dual Annulation: A Method for the Synthesis of Norneocryptolepine
Yeh, Li-Hsuan,Wang, Hung-Kai,Pallikonda, Gangaram,Ciou, Yu-Lun,Hsieh, Jen-Chieh
, (2019/03/19)
A novel procedure for the Pd-catalyzed dual annulation reaction to synthesize the norneocryptolepine derivatives involving the concerted construction of two central heterocycles is reported. The further methylation of the norneocryptolepine to afford its alkaloid analog neocryptolepine implies that synthesis of various neocryptolepine derivatives is feasible. The oxidative addition of Pd(0) is indicated as the key step to activate the intramolecular addition of nitrile according to the mechanism study.