反应详情

Diethyl azodicarboxylate (0.297 g, 1.71 mmol) was added to a solution of 4-chloro-7-hydroxy-6-methoxyquinazoline (0.3 g, 1.42 mmol), (prepared as described for the starting material in Example 4), triphenylphosphine (0.485 g, 1.85 mmol) and 2-(N-methyl-N-prop-2-yn-1-ylamino)ethanol (0.177 g, 1.56 mmol) in methylene chloride (8 ml). The mixture was stirred for 2 hours at ambient temperature and poured onto a column of silica and eluted with increasingly polar mixtures of methylene chloride and ethyl acetate followed by ethyl acetate to give 4-chloro-6-methoxy-7-[2-(N-methyl-N-prop-2-yn-1-ylamino)ethoxy]quinazoline (0.341 g, 78%).

1. custom(prepared
2. additionpoured onto a column of silica
3. washeluted
4. temperaturewith increasingly polar mixtures of methylene chloride and ethyl acetate