Br.C([O:5][C:6]1[CH:7]=[C:8]([CH:16]([OH:23])[CH2:17][NH:18][C:19]([CH3:22])([CH3:21])[CH3:20])[CH:9]=[C:10]([O:12]C(=O)C)[CH:11]=1)(=O)C.O.CCOCC>C(O)C.[Pd]>[OH:5][C:6]1[CH:7]=[C:8]([CH:16]([OH:23])[CH2:17][NH:18][C:19]([CH3:21])([CH3:20])[CH3:22])[CH:9]=[C:10]([OH:12])[CH:11]=11.1 g of this salt were dissolved in warm absolute ethanol and 0.1 g 10% palladium charcoal were added. The solution was then hydrogenated at 50°C. and 5 atmospheres pressure overnight. The catalyst was filtered off and the volume of the solution reduced by evaporation. The hydrobromide of 1-(3',5'-diacetoxyphenyl)-2-(t-butylamino)-ethanol with 1 mole of water was precipitated by the addition of ether. M.p. 108°-111°C. The protective acetyl groups may be removed by boiling the 1-(3',5'-diacetoxyphenyl)-2-(t-butylamino)-ethanol hydrobromide with 1% hydrobromic acid for three hours. After evaporation and drying the product was recrystallized as described in Example 2c.
불러오는 중…
