Acid‐Mediated Three Component Assembly of 4‐Fluoropyrazoles from α‐Fluoronitroalkenes, Hydrazines, and Aldehydes
作者:Vladimir A. Motornov、Andrey A. Tabolin、Yulia V. Nelyubina、Valentine G. Nenajdenko、Sema L. Ioffe
DOI:10.1002/ejoc.202000841
日期:2020.8.31
Three‐component one pot assembly of 4‐fluoropyrazoles is described. The method involves formal oxidative [3+2]‐annulation between elusive fluoroalkynes and azomethine imines.
Reaction of 6-amino-5-nitrosouracil derivatives with various substituted hydrazones of aldehydes led to the formation of the corresponding xanthine derivatives.