作者:Allyn T. Londregan、Jennifer Clemens、Emily L. Bell
DOI:10.1055/s-0040-1719917
日期:2022.7
A general and selective procedure for the N2-alkylation of 1H-indazoles and 1H-azaindazoles is presented. Promoted by either trifluoromethanesulfonic acid or copper(II) triflate, diverse 1H-indazoles/azaindazoles are selectively alkylated with varied primary, secondary, and tertiary alkyl 2,2,2-trichloroacetimidates at the N2-nitrogen to afford the corresponding 2-alkyl-2H-indazoles/azaindazoles. Forty-one
介绍了 1 H-吲唑和 1 H-氮杂吲唑的 N2-烷基化的一般和选择性程序。在三氟甲磺酸或三氟甲磺酸铜 (II) 的促进下,不同的 1 H-吲唑/氮杂吲唑在 N2-氮上被不同的伯、仲和叔烷基 2,2,2-三氯乙酰亚胺酯选择性烷基化,得到相应的 2-烷基-2 H-吲唑/氮杂吲唑。包括四十一个例子以及对反应优化、范围和机理的讨论。