Synthesis of N-Arylindazoles and Benzimidazoles from a Common Intermediate
摘要:
A variety of N-aryl-1H-indazoles and benzimidazoles were synthesized from common arylamino oximes in good to excellent yields The product selectivity depends upon the base used in the reaction, as triethylamine promoted the formation of benzimidazoles, whereas 2-aminopyridine promoted the formation of N-arylindazoles This method is valuable to the synthetic community because both indazoles and benzimidazoles are prevalent in pharmaceuticals
A method is provided for synthesizing 1H-indazole compounds in which aromatic carbonyl compounds are reacted with a nitrogen source to form oximes which are then converted to 1H-indazoles.
提供了一种合成1H-吲唑化合物的方法,其中芳香酮化合物与氮源反应形成肟类,然后转化为1H-吲唑。
US8022227B2
申请人:——
公开号:US8022227B2
公开(公告)日:2011-09-20
Synthesis of <i>N</i>-Arylindazoles and Benzimidazoles from a Common Intermediate
作者:Brenda C. Wray、James P. Stambuli
DOI:10.1021/ol101899q
日期:2010.10.15
A variety of N-aryl-1H-indazoles and benzimidazoles were synthesized from common arylamino oximes in good to excellent yields The product selectivity depends upon the base used in the reaction, as triethylamine promoted the formation of benzimidazoles, whereas 2-aminopyridine promoted the formation of N-arylindazoles This method is valuable to the synthetic community because both indazoles and benzimidazoles are prevalent in pharmaceuticals
Construction of 1H-indazoles from ortho-aminobenzoximes by the Mitsunobu reaction
作者:Ivie L. Conlon、Katie Konsein、Yulemni Morel、Alexandria Chan、Steven Fletcher
DOI:10.1016/j.tetlet.2019.07.020
日期:2019.9
ortho-aminobenzoximes to Mitsunobu conditions will likewise induce a cyclodehydration to deliver the corresponding 1H-indazoles. Indeed, secondary anilines afforded the predicted N1-substituted 1H-indazoles, and primary anilines, after activation with a Boc group, furnished the N1-Boc 1H-indazoles in good to excellent yields. This work further expands the chemical repertoire of the Mitsunobu reaction, representing