反应详情

A solution of 4-chloro-3-iodo-5-phenyl-1H-pyrazolo[3,4-c]pyridazine and 4-chloro-5-phenyl-1H-pyrazolo[3,4-c]pyridazine (9:1, 1.4 g), 2-(4-methylpiperazin-1-yl)ethanol (1.13 g, 7.8 mmol), diethyl azodicarboxylate (1.37 g, 7.8 mmol) and triphenyl phosphine (2.07 g, 7.9 mmol) in 1,4-dioxane (26 mL) was heated to 85° C. for 1 h and then cooled to room temperature and concentrated in vacuo. The residue was partially purified by column chromatography (silica gel, starting with iso-hexanes/ethyl acetate 1:0 to 0:1 and finishing with ethyl acetate/4 M NH3 in MeOH 1:0 to 9:1). The residue was purified by preparative HPLC to provide Compounds Ia, Ib, and 20.

1. concentrationconcentrated in vacuo
2. customThe residue was partially purified by column chromatography (silica gel, starting with iso-hexanes/ethyl acetate 1:0 to 0:1 and finishing with ethyl acetate/4 M NH3 in MeOH 1:0 to 9:1)
3. customThe residue was purified by preparative HPLC
4. customto provide Compounds Ia, Ib, and 20