benzyl N-(2-bromoethyl)carbamate → 2-{2-[(Benzyloxycarbonyl)amino]ethyl}-5-chloro-3-phenylisoindole-1-carboxylic acid ethyl ester
Reaktionsgleichung
[CH2:1]([O:3][C:4]([C:6]1[NH:7][C:8]([C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)=[C:9]2[C:14]=1[CH:13]=[CH:12][C:11]([Cl:15])=[CH:10]2)=[O:5])[CH3:2].[CH2:22]([O:29][C:30]([NH:32][CH2:33][CH2:34]Br)=[O:31])[C:23]1[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1>>[CH2:1]([O:3][C:4]([C:6]1[N:7]([CH2:34][CH2:33][NH:32][C:30]([O:29][CH2:22][C:23]2[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=2)=[O:31])[C:8]([C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)=[C:9]2[C:14]=1[CH:13]=[CH:12][C:11]([Cl:15])=[CH:10]2)=[O:5])[CH3:2]Komponenten
3
Versuchsvorschrift
15.0 G. of 5-chloro-3-phenylisoindole-1-carboxylic acid ethyl ester are reacted with 25.8 g. of 2-[(benzyloxycarbonyl)amino]ethyl bromide in a manner analogous to that described in Example 14. Thereafter, there is obtained an oily crude product, which is chromatographed on 250 g. of silica gel with methylene chloride/ethyl acetate (4:1) as the eluant. From the uniform fractions there is obtained 2-{2-[(benzyloxycarbonyl)amino]ethyl}-5-chloro-3-phenylisoindole-1-carboxylic acid ethyl ester; melting point 102°-104° C. Recrystallization from ethanol increases the melting point to 104°-105° C.