作者:My Linh Tong、Lena Theresa Leusch、Kristina Holzschneider、Stefan F. Kirsch
DOI:10.1021/acs.joc.0c00465
日期:2020.5.1
Rubazonic acids are a class of dyes that are long-known, but studies on their syntheses and uses are rare. We now describe an experimentally simple and highly practical one-pot procedure for their synthesis starting from easily accessible 1H-pyrazol-5(4H)-ones. This protocol provides direct access to a broad range of the desired rubazonic acid derivatives through oxidative diazidation combined with