tert-butyl (6-{[({(1Z)-2-[hydroxy(methyl)amino]-2-imino-1-(3-fluorophenyl)ethylidene}amino)oxy]methyl}pyridin-2-yl)carbamate 、
N,N'-羰基二咪唑 在
乙酸乙酯 、
水 、
magnesium sulfate 、 silica gel 作用下,
以
乙腈 为溶剂,
反应 7.0h,
以to give tert-butyl {6-[({[(Z)-(2-methyl-5-oxo-2,5-dihydro-1,2,4-oxadiazol-3-yl)(3-fluorophenyl)methylene]amino}oxy)methyl]pyridin-2-yl}carbamate (9.57 g, 66% yield) as a white solid的产率得到tert-butyl {6-[({[(Z)-(2-methyl-5-oxo-2,5-dihydro-1,2,4-oxadiazol-3-yl)(3-fluorophenyl)methylene]amino}oxy)methyl]pyridin-2-yl}carbamate