The reductive cyclisation of o-nitrobenzanilides with zinc and sodium hydroxide in aqueous methanol provides a convenient source of 2-arylindazol-3-ones.
Synthesis and Anti-Inflammatory Activity of N(2)-Arylindazol-3(2H)-One Derivatives: Copper-Promoted Direct N-Arylation via Chan–Evans–Lam Coupling
作者:Kyungmin Kim、Jeong Ho Kim、Heejae Choi、Byeongno Lee、Jihyun Lee、Kang Min Ok、Tae Hoon Lee、Hakwon Kim
DOI:10.3390/molecules28186706
日期:——
compounds. In this study, we present a highly efficient synthetic method for direct N-arylation to produce a variety of N(2)-arylindazol-3(2H)-ones3, which exhibit anti-inflammatory activity. The Chan–Evans–Lam (CEL) coupling of N(1)-benzyl-indazol-3-(2H)-ones 1 with arylboronic acids 2 in the presence of a copper complex provided the corresponding N(2)-arylindazol-3(2H)-ones3 in good-to-excellent
作者:Clive W. Bird、Joanne C. W. Chng、Nasim H. Rama、Aamer Saeed
DOI:10.1080/00397919108016781
日期:1991.2
The reductive cyclisation of o-nitrobenzanilides with zinc and sodium hydroxide in aqueous methanol provides a convenient source of 2-arylindazol-3-ones.
BIRD, CLIVE W.;CHNG, JOANNO C. W.;RAMA, NASIM H.;SAEED, AAMER, SYNTH. COMMUN., 21,(1991) N, C. 545-548
作者:BIRD, CLIVE W.、CHNG, JOANNO C. W.、RAMA, NASIM H.、SAEED, AAMER
DOI:——
日期:——
BIRD, C. W.;KAPILI, M., TETRAHEDRON, 43,(1987) N 20, 4621-4624
作者:BIRD, C. W.、KAPILI, M.
DOI:——
日期:——
A B<sub>2</sub>(OH)<sub>4</sub>-Mediated Synthesis of 2-Substituted Indazolone and Its Application in a DNA-Encoded Library
作者:Yapeng Bao、Zongfa Deng、Jing Feng、Weiwei Zhu、Jin Li、Jinqiao Wan、Guansai Liu
DOI:10.1021/acs.orglett.0c02032
日期:2020.8.21
Indazolone cores are among the most common structural components in medicinal chemistry and can be found in many biologically active molecules. In this report, a mild and efficient approach to 2-substituted indazolones via B-2(OH)(4)-mediated reductive N-N bond formation is developed. This strategy features mild conditions, no request for a metal catalyst, and a wide scope for both aliphatic and aromatic amines. Meanwhile, this method was further successfully applied on DNA to construct indazolone cores for a DNA-encoded library. This will enable the production of a very attractive indazolone-cored library from simple amines and scaffolds, which will provide considerable diversity.