反应详情

A solution of sodium nitrite (1.725 g) of water (5.42 ml) was added in portions to a solution of 2-isopropyl-6-(2-oxo-2-phenylethyl)-3(2H)-pyridazinone (2.57 g) in a mixture of AcOH (2 ml) and EtOAc (8 ml) at 20-25° C. and the mixture was stirred at the same temperature for 8 hours. EtOAc was added to the mixture, washed with sat. aq. NaHCO3 solution and brine, dried over MgSO4 and concentrated under reduced pressure to give a solid. The solid was triturated with IPE and collected by filtration to give 1-(1-isopropyl-6-oxo-1,6-dihydro-3-pyridazinyl)-2-phenyl-1,2-ethanedione 1-oxime as a solid (1.71 g), which was identical to the authentic sample (the product of Preparation 1) by melting point and IR, MS and NMR spectra.

1. washwashed with sat. aq. NaHCO3 solution and brine
2. dry with materialdried over MgSO4
3. concentrationconcentrated under reduced pressure
4. customto give a solid
5. customThe solid was triturated with IPE
6. filtrationcollected by filtration