反应详情

2-Amino-5-chloropyrazine-3-carboxylic acid pyrrolidide (9 g. or 0.04 mol) was added to a freshly prepared solution of 36.2 g. (0.2 mol) of phenylmagnesium bromide in 300 ml. of tetrahydrofuran cooled to 20°. After addition, the reaction mixture was stirred for 3 hours at room temperature and was then hydrolyzed by addition of 150 ml. of water. The organic layer was separated, dried over alumina, filtered and evaporated. Crystallization of the oil obtained from ether yielded 2 g. (50%) of the above-named product as yellow crystals, m.p. 158°-161°. The analytical sample was recrystallized from ethyl acetate, m.p. 160°-161°.

1. additionAfter addition
2. additionwas then hydrolyzed by addition of 150 ml
3. customThe organic layer was separated
4. customdried over alumina
5. filtrationfiltered
6. customevaporated
7. customCrystallization of the oil
8. customobtained from ether
9. customyielded 2 g
10. customThe analytical sample was recrystallized from ethyl acetate, m.p. 160°-161°