(PhIO)<sub>n</sub>Mediated Annulations of Aromatic Aldehyde N-Acylhydrazones for the Synthesis of 1,3,4-Oxadiazoles
作者:Zhenhua Shang、Jing Ha、Xiao Tao、Longpeng Xu、Qing Liu、Pan Wang
DOI:10.5012/bkcs.2013.34.6.1879
日期:2013.6.20
Although these methods are very useful for the preparation of large quantities of materials due to the ready availability of diacylhydrazines, hydrazides, and hydrazones as starting materials, the reaction conditions tend to be harsh and long reaction times are generally needed. An alternative route to 1,3,4-oxadiazoles 2 by oxidative cyclization from the corresponding aldehyde N-acylhydrazones 1 proceeds