[BrH:1].[CH2:2]([O:4][C:5](=[O:30])[C@H:6]([CH2:22][C:23]1[CH:28]=[CH:27][C:26]([OH:29])=[CH:25][CH:24]=1)[NH:7][C:8](=[O:21])[CH2:9][NH:10]C(OCC1C=CC=CC=1)=O)[CH3:3].C(OCC)C>C(O)(=O)C>[CH2:2]([O:4][C:5](=[O:30])[C@H:6]([CH2:22][C:23]1[CH:28]=[CH:27][C:26]([OH:29])=[CH:25][CH:24]=1)[NH:7][C:8](=[O:21])[CH2:9][NH2:10])[CH3:3].[BrH:1]250 ml of 25% HBr in glacial acetic acid was added to carbobenzoxyglycyl-L-tyrosine ethyl ester obtained above, and after the mixture was stirred for 30 minutes at room temperature, 5 l of absolute ethyl ether was added to the mixture to produce a precipitate. The precipitate was washed with ethyl ether to obtain glycyl-L-tyrosine ethyl ester·HBr.
불러오는 중…