反应详情

2-Aminopyrazine-3-carboxylic acid pyrrolidide (63.4 g. or 0.33 mol) was added to a solution of freshly prepared phenylmagnesium bromide (305 g.) in 1 l. of tetrahydrofuran while the temperature was kept at 20°-30° by cooling with an ice bath. After stirring at room temperature for 2 hours, the mixture was hydrolyzed by addition of 2 l. of water. The aqueous layer was extracted twice with 500 ml. of methylene chloride. The extracts were combined with the organic layer, dried over sodium sulfate and evaporated. The brown residue was slurried with ether to yield 37.5 g. (56%) of yellow crystals of the above-named product.

1. customwas kept at 20°-30°
2. temperatureby cooling with an ice bath
3. additionthe mixture was hydrolyzed by addition of 2 l
4. extractionThe aqueous layer was extracted twice with 500 ml
5. dry with materialdried over sodium sulfate
6. customevaporated
7. customto yield 37.5 g