[C:1]([C:4]1[CH:5]=[C:6]([CH:36]=[CH:37][C:38]=1[OH:39])[O:7][CH2:8][CH2:9][N:10](CC1C=CC=CC=1)[CH2:11][CH:12]([OH:28])[CH2:13][O:14][C:15]1[CH:20]=[CH:19][C:18]([CH2:21][CH2:22][O:23][CH2:24][CH:25]2[CH2:27][CH2:26]2)=[CH:17][CH:16]=1)(=[O:3])[NH2:2].[H][H]>CO.[Pd]>[C:1]([C:4]1[CH:5]=[C:6]([CH:36]=[CH:37][C:38]=1[OH:39])[O:7][CH2:8][CH2:9][NH:10][CH2:11][CH:12]([OH:28])[CH2:13][O:14][C:15]1[CH:20]=[CH:19][C:18]([CH2:21][CH2:22][O:23][CH2:24][CH:25]2[CH2:27][CH2:26]2)=[CH:17][CH:16]=1)(=[O:3])[NH2:2]A solution of 30 g of crude 1-[N-[2-(3-carbamoyl-4-hydroxyphenoxy)-ethyl]-benzylamino]-3-[4-[2-(cyclopropylmethoxy)ethyl]-phenoxy]-2-propanol in 600 ml of methanol is hydrogenated, with the addition of 4 g of a Pd/C catalyst (5%), under normal conditions until 1 mol-equivalent of hydrogen has been absorbed. By the addition of dioxane and by heating, the product which has already crystallied out is taken into solution; the catalyst is filtered off and the filtrate is concentrated by evaporation. Recrystallisation from isopropanol and then from methanol yields pure 1-[2-(3-carbamoyl-4-hydroxy-phenoxy)-ethylamino]-3-[4-[2-(cyclopropylmethoxy)-ethyl]-phenoxy]-2-propanol, m.p. 149°-150°.
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