141235-75-8Relevant academic research and scientific papers
Copper(I)-catalyzed tandem cyclization/condensation reaction to novel 4,5-dihydropyrazolo[1,5-a]quinolines and pyrazolo[1,5-a]indoles
Hang, Chenchen,Li, Qiulian,Zhu, Yongming,Katayama, Hajime
, p. 3318 - 3324 (2011/09/15)
A facile copper(I)-catalyzed tandem reaction for the synthesis of 4,5-dihydropyrazolo[1,5-a]quinolines and pyrazolo[1,5-a]indoles is reported here. High efficiency and good yields are displayed in this transformation under mild reaction conditions.
Synthesis of pyrazolo[1,5-a]indoles via copper(I)-catalyzed intramolecular amination
Zhu, Yong-Ming,Qin, Lie-Na,Liu, Rui,Ji, Shun-Jun,Katayama, Hajime
, p. 6262 - 6266 (2008/02/10)
A variety of pyrazolo[1,5-a]indole derivatives were synthesized via Cu(I)-catalyzed intramolecular amination reactions. This novel method provides a general and efficient synthesis to indoles fused with pyrazole rings in high yields.
Intramolecular Reaction of the Hydrazonyl Group with Formyl and Oxo Groups: Preparation of Pyrazoloindoles and Related Pyrazolo Compounds
Shen, Jing-Kang,Katayama, Hajime,Takatsu, Noriyuki,Shiro, Itsuo
, p. 2087 - 2098 (2007/10/02)
Lewis acid-catalysed intramolecular nucleophilic attack of a hydrazonyl group onto aldehyde and ketone groups gives pyrazoles and dihydropyrazoles.Pyrazoloindoles and related pyrazolo compounds have also been prepared.
Preparation of Pyrazole and Pyrazoline Derivatives by Intramolecular Reaction of Hydrazones
Shen, Jing-Kang,Katayama, Hajime
, p. 451 - 452 (2007/10/02)
Pyrazole and pyrazoline derivatives are prepared by the intramolecular cyclization reaction of a hydrazonyl group with formyl or keto groups in the presence of a Lewis acid.
