facile synthesis of 1H-indazoles featuring a Cu(OAc)2-catalyzed N–N bond formation using oxygen as the terminal oxidant is described. The reaction of readily available 2-aminobenzonitriles with various organometallic reagents led to o-aminoaryl N–H ketimine species. The subsequent Cu(OAc)2-catalyzed N–N bond formation in DMSO under oxygen afforded a wide variety of 1H-indazoles in good to excellent
Base-catalyzed synthesis of quinazolines in aqueous medium
作者:Nagesh Jatangi、Radha Krishna Palakodety
DOI:10.1016/j.tetlet.2019.151186
日期:2019.10
An alternative green protocol and step economy for the synthesis of quinazoline has been developed. The reaction of readily available 2-aminobenzonitriles with various organometallic reagents led to ortho-aminoaryl N-H ketimine species. The subsequent base catalysed N-C bond formation with various isothiocyanates afforded quinazoline scaffolds in aqueous medium. The salient features of this protocol