4560-13-8Relevant academic research and scientific papers
Pd(II)-Catalyzed Intramolecular C(sp2)-H Arylation of Tryptamines Using the Nonsteric NH2as a Directing Group
Wang, Sixi,Yu, Bin,Liu, Hong-Min
supporting information, p. 42 - 48 (2021/01/09)
The free amine-directed C-H functionalization reactions are challenging and mainly restricted to bulky amines. In this work, we report the nonsteric NH2-directed Pd(II)-catalyzed intramolecular C(sp2)-H arylation of tryptamines, which enables the efficient, gram-scale, and regioselective synthesis of versatile 2-aryltryptamines (35 examples, up to 98% yield). This approach broadens the substrate scope of the free amine-directed C-H functionalization, not limited to bulky amine substrates. Late-stage elaborations of 2-aryltryptamines achieve the divergent construction of the complex core structures that are prevalent in highly valuable natural products such as aurantioclavine, chimonanthine, and phalarine.
PREPARATION OF 3-AMINOALKYL-SUBSTITUTED INDOLE DERIVATIVES FROM PHENYLHYDRAZINES AND AMINOKETONES
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Page 12, (2008/06/13)
The present invention relates to a process for the preparation of indole derivatives, particularly those, which are useful as pharmaceutical intermediates. The process involves formation of hydrazone derivative between a phenyl hydrazine and a ketone amine, followed by cyclisation to give desired 2,3-substituted indole derivative in the presence of acid catalyst.
A versatile linkage strategy for solid-phase synthesis of N,N-dimethyltryptamines and β-carbolines
Wu, Tom Y. H.,Schulte, Peter G.
, p. 4033 - 4035 (2007/10/03)
(matrix presented) Various tryptamines are captured by a vinylsulfonylmethyl polystyrene resin, generating a safety-catch linkage. β-Carbolines can be formed from 4 by a Pictet-Spengler reaction with the introduction of R1. Tryptamine 4 can also be derivatized by acylation or copper-mediated coupling to introduce R2. If X = Br, Suzuki coupling can be used to introduce R3. After derivatization, the indole derivatives are activated with methyl iodide and released under mild basic condition.
2-aryl tryptamines: Selective high-affinity antagonists for the h5-HT(2A) receptor
Stevenson, Graeme I,Smith, Adrian L,Lewis, Stephen,Michie, Stephen G,Neduvelil, Joseph G,Patel, Smita,Marwood, Rosemarie,Patel, Shil,Castro, Jose L
, p. 2697 - 2699 (2007/10/03)
A series of 2-aryl tryptamines have been identified as high-affinity h5-HT(2A) antagonists. Structure-activity relationship studies have shown that h5-HT(2A) affinity can be attained via modifications to the tryptamine side chain and that selectivity over h5-HT(2C) and hD2 receptors can be controlled by suitable C-2 aryl groups. (C) 2000 Elsevier Science Ltd.
