Synthesis of Spirocyclic Pyrazolones by Oxidative C–N Bond Formation
作者:Javier Agejas、Laura Ortega
DOI:10.1021/acs.joc.5b00796
日期:2015.6.19
The two-step synthesis of spirocyclic pyrazolone derivatives from simple and commercially available reagents is described. The unusual reaction of 1,3-dicarbonyls with hydrazines and an iodine-mediated oxidative carbon–nitrogen bond formation, joined in a two-step, one-pot reaction, allows the straightforward synthesis of these spirocycles.