1.
Org Lett
; 21(13): 5046-5050, 2019 Jul 05.
Article
in English
| MEDLINE
| ID: mdl-31247786
ABSTRACT
A variety of pyrrolo[3,4- c]pyrazole derivatives from readily available aldehyde hydrazones and maleimides via direct oxidative coupling under radical cascade reaction have been reported. This method offers satisfactory chemical yields and good functional group compatibility. Moreover, this practical approach is catalyzed by CuCl utilizing air as the oxidant and some control experiments were performed to elaborate the mechanism.