442155-81-9Relevant academic research and scientific papers
Nickel-Catalyzed Arylative Additions on 2-Alkynyl-N-Arylsulfonylanilides to Construct Functionalized Indoles
Dake, Gregory R.,Voth, Christopher N.
, p. 744 - 748 (2020/02/13)
The addition of aryl iodides to 2-alkynyl-N-sulfonylanilides to form 2,3-difunctionalized N-arylsulfonylindoles can be catalyzed using a nickel catalyst ligated to a bis(cyclohexanyl)phosphinoferrocene. A variety of nickel complexes can be used as precata
An efficient synthesis of indoles via a CuMgAl-LDH-catalyzed cyclization of 2-alkynylsulfonanilides
Zhang, Sheng-Yan,Sun, Shan-Gang,Guo, Yu-Shuang,Lu, Xiao-Fan,Guo, Dian-Shun
, p. 3719 - 3723 (2018/09/14)
A highly efficient method for the synthesis of indoles has been successfully developed via a CuMgAl-LDH-catalyzed intramolecular annulation reaction of 2-alkynylsulfonanilides. This CuMgAl-LDH catalyst features facile preparation, recovery, and reuse at l
An annulative electrophilic amination approach to 3-aminobenzoheteroles
Matsuda, Naoki,Hirano, Koji,Satoh, Tetsuya,Miura, Masahiro
, p. 617 - 625 (2012/02/16)
A copper-catalyzed annulative amination approach to 3-aminobenzofurans and -indoles from o-alkynylphenols and -anilines has been developed. The Cu-based catalysis is based on an umpolung, electrophilic amination with O-benzoyl hydroxylamines and enables t
Development of an Efficient Procedure for Indole Ring Synthesis from 2-Ethynylaniline Derivatives Catalyzed by Cu(II) Salts and Its Application to Natural Product Synthesis
Hiroya, Kou,Itoh, Shin,Sakamoto, Takao
, p. 1126 - 1136 (2007/10/03)
The development of efficient methods for the indole synthesis catalyzed by Cu(II) salts and its applications were investigated. Cu(OAc)2 has been proved to be the best catalyst for the synthesis of various 1-p-tolylsulfonyl or 1-methylsulfonylindoles, which have both electron-withdrawing and electron-donating groups on the aromatic ring and C2 position of indoles. For the primary aniline derivatives, Cu(OCOCF 3)2 showed good activities, while Cu(OAc)2 was a good catalyst for the cyclization of secondary anilines. This methodology could be applied to the sequential cyclization reaction for the compounds which have the electrophilic part in the same molecule. By prior treatment with KH, the sequential cyclization was realized to provide the tricyclic ring systems, but it was limited to five- and six-membered rings for the second cyclization. Finally, formal and total synthesis of hippadine with the Cu(II)-promoted indole synthesis as the key step was accomplished.
