Aerobic Cu(I)‐Catalyzed Site‐Selective 1,3‐Difunctionalization of Indazole through Cascade C−N and C−O Bond Formation
作者:Krishna Kanta Das、Asim Kumar Ghosh、Tamanna Mallick、Naznin Ara Begum、Alakananda Hajra
DOI:10.1002/adsc.202201162
日期:2023.2.7
A Cu(I)-catalyzed 1,3 oxo alkylation of indazole has been developed for constructing N-1-alkylated indazolone derivatives. This cascade reaction involves the formation of C−N and C−O bonds through the sequential functionalization of N1 and C3 positions of indazole in 41–89% yields. The photo-physical studies of the synthesized compounds showed efficient quantum yields with high Stoke shift values.
Microwave-Assisted Base-Catalyzed Cyclization and Nucleophilic Substitution of<i>O</i>-Azidobenzanilides to Synthesize 1,2-Disubstituted Indazol-3-ones
作者:Arthur Y. Shaw、Yi-Ru Chen、Chia-Hua Tsai
DOI:10.1080/00397910802663386
日期:2009.7.7
of 1,2-disubstituted indazol-3-ones were synthesized by microwave-assisted base-catalyzed cyclization and nucleophilicsubstitution of o-azidobenzanilides. Among five tested reaction conditions, the cyclization of o-azidobenzanilides catalyzed by sodium hydride in DMF, sequentially followed by the nucleophilicsubstitution under microwave irradiation, exhibited the optimal results. Moreover, compared
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