Indazoles: Regioselective Protection and Subsequent Amine Coupling Reactions
摘要:
Indazoles are unselectively protected under strongly basic conditions to give a mixture at N-1 and N-2. Under mildly acidic conditions, regioselective protection at N-2 takes place. Thermodynamic conditions lead to regioselective protection at N-1. This trend applies to various substituted indazoles. Protected 5-bromoindazoles participate in Buchwald reactions with a range of amines to generate novel derivative.
Tropomyosinreceptorkinases (TRKs), the superfamily of transmembrane receptor tyrosine kinases, have recently become an attractive method for precision anticancer therapies since the approval of Larotrectinib and Entrectinib by FDA. Herein, we reported the discovery of a series of novel indazolylaminoquinazoline and indazolylaminoindazole as TRK inhibitors. The representative compound 30f exhibited
Indazoles: Regioselective Protection and Subsequent Amine Coupling Reactions
作者:David J. Slade、Nicholas F. Pelz、Wanda Bodnar、John W. Lampe、Paul S. Watson
DOI:10.1021/jo9006656
日期:2009.8.21
Indazoles are unselectively protected under strongly basic conditions to give a mixture at N-1 and N-2. Under mildly acidic conditions, regioselective protection at N-2 takes place. Thermodynamic conditions lead to regioselective protection at N-1. This trend applies to various substituted indazoles. Protected 5-bromoindazoles participate in Buchwald reactions with a range of amines to generate novel derivative.
Palladium‐Catalyzed Regioselective C−H Oxidative Arylation of 7‐Azaindazole <i>N</i>‐Oxide at the C6‐Position
作者:Sarah Nassiri、Mostapha Bousmina、Franck Suzenet、Gérald Guillaumet、Saïd El Kazzouli
DOI:10.1002/ejoc.202300730
日期:2023.12
A novel approach to perform C−H/C−H functionalization at the C6 position of 7-azaindazoles is reported. This method employs regioselective oxidative arylation, facilitated by N-oxide activation. By utilizing this technique, precise and innovative synthesis of C6-arylated 7-azaindazoles using various substituted arenes and heteroarenes is achieved.