反应详情

温度

25 °C

A mixture of the two isomers of 2,3-dihydro-2-(2,2-diethoxyethyl)-3-(1-nitroethyl)-isoindol-1-one (2.5 g, described in Example 30) and 10% palladium on carbon (0.25 g) in acetic acid-water (4:1, 50 ml) is stirred under an atmosphere of hydrogen at 50 psi and 25° C. for 18 hr and filtered. The filtrate is evaporated and dissolved in 2% hydrochloric acid. The solution is washed with diethyl ether, basified to pH 9 with ammonium hydroxide and extracted with ethyl acetate. The organic extract is dried, evaporated and chromatographed on silica gel using acetone-benzene (2:3). Evaporation of the eluates gives isomer A (1.14 g) of the title compound, ir (CHCl3) 1675, 1120 and 1050 cm-1 and isomer B (0.88 g) of the title compound, ir (CHCl3) 1675, 1120 and 1050 cm-1.

1. filtrationfiltered
2. customThe filtrate is evaporated
3. dissolutiondissolved in 2% hydrochloric acid
4. washThe solution is washed with diethyl ether
5. extractionextracted with ethyl acetate
6. extractionThe organic extract
7. customis dried
8. customevaporated
9. customchromatographed on silica gel
10. customEvaporation of the eluates