反应详情

A solution of 3.0 g (0.008 mole) of 3-(cyanodiphenylmethyl)-1-pyrrolidinecarboxylic acid phenyl ester in 100 ml of 90% sulfuric acid was stirred at 70° C. for 20 hr. The reaction mixture was cooled, poured over ice and basified by adding, alternately, 50% sodium hydroxide and ice. The mixture was extracted with chloroform. The chloroform extract was washed with water, dried over sodium sulfate and concentrated in vacuo. The residue was crystallized in ethyl acetate. Recrystallization from ethyl acetate-ethanol gave 1.4 g (65%) of title product, molecular ion at 281 by mass spectrometer analysis.

1. temperatureThe reaction mixture was cooled
2. additionpoured over ice
3. additionby adding
4. extractionThe mixture was extracted with chloroform
5. extractionThe chloroform extract
6. washwas washed with water
7. dry with materialdried over sodium sulfate
8. concentrationconcentrated in vacuo
9. customThe residue was crystallized in ethyl acetate
10. customRecrystallization from ethyl acetate-ethanol