Synthesis of Substituted 1H-Indazoles by Pyrazole Annelation to an Arene
摘要:
Substituted 1H-indazoles have been synthesized by reductive intramolecular heterocyclization of 2,4-di-aroyl-N-nitrosomethylanilines and 2,4-diacetyl-N-nitrosomethylaniline. The N-nitrosoanilines were obtained by nitrosation of N-methyl-2,4-diaroyl- and 2,4-diacetylanilines, the products of quaternary 3,5-diaroyl- and 3,5-diacetylpyridinium salt recyclization.
Rongalite as C1 Synthon in the Synthesis of Divergent Pyridines and Quinolines
作者:Huan Gao、Liyun Zhou、Jie-Ping Wan、Yunyun Liu
DOI:10.1021/acs.joc.3c00428
日期:2023.6.2
Rongalite has been used as a cheap and efficient carbon synthon for the synthesis of divergent N-heteroaromatics, including different pyridines and quinolines. The selective synthesis of different products can be achieved by employing enaminones or enaminones/anilines as reaction partners. In addition, compared with the reaction using conventional aldehyde synthons, rongalite displays an evident advantage