反应详情

温度

-70 °C

2-Carbomethoxy-3-phenyl-1,3-diazabicyclo[3,3,0]octane prepared from 1.76 g of (S)-2-(anilinomethyl)pyrrolidine, as described in Example 8, was dissolved in 50 ml of THF, then admixed with 1.05 g of anhydrous magnesium chloride and refluxed by heating for 10 minutes. To the mixture cooled to -70° C., was added dropwise an ether solution containing 1.46 equivalents of ethylmagnesium bromide. The resulting mixture was treated as described in Example 12 to obtain 694 mg (28%) of 2-propionyl-3-phenyl-1,3-diazabicyclo[3,3,0]octane. NMR peaks: δ(ppm)=1.0 (3H, triplet), 1.4-2.1 (4H, multiplet), 2.1-2.6 (2H, multiplet), 2.6-3.3 (3H, multiplet), 3.5-3.9 (2H, multiplet), 4.2 (1H, singlet), 6.1-7.1 (5H, multiplet).

1. temperaturerefluxed
2. temperatureby heating for 10 minutes
3. additionThe resulting mixture was treated