Facile Synthesis of Symmetric and Unsymmetric 1,3,4-Oxadiazoles Using 2-Acyl(or aroyl)pyridazin-3-ones
作者:Yong-Jin Yoon、Yong-Dae Park、Jeum-Jong Kim、Hyun-A Chung、Deok-Heon Kweon、Su-Dong Cho、Sang-Gyeong Lee
DOI:10.1055/s-2003-37647
日期:——
Symmetric and unsymmetric 1,3,4-oxadiazoles were synthesized in situ from hydrazine hydrate and the corresponding 2-acyl-4,5-dichloropyridazin-3-ones as acylating agents in polyphosphoric acid or BF 3 OEt 2 in excellent yields.