Ethyl bromoacetate → 4-[1-(2,2-Dimethylpropionyloxymethyl)-3-ethoxycarbonylmethyl-2,6-dioxo-7-(2-vinylphenyl)-2,3,6,7-tetrahydro-1H-purin-8-yl]piperazine-1-carboxylic acid tert-butyl ester

Reaction equation

[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][N:11]([C:14]2[N:22]([C:23]3[CH:28]=[CH:27][CH:26]=[CH:25][C:24]=3[CH:29]=[CH2:30])[C:21]3[C:20](=[O:31])[N:19]([CH2:32][O:33][C:34](=[O:39])[C:35]([CH3:38])([CH3:37])[CH3:36])[C:18](=[O:40])[NH:17][C:16]=3[N:15]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].Br[CH2:42][C:43]([O:45][CH2:46][CH3:47])=[O:44].C(=O)([O-])[O-].[K+].[K+]>CN(C)C=O.C(OCC)(=O)C>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][N:11]([C:14]2[N:22]([C:23]3[CH:28]=[CH:27][CH:26]=[CH:25][C:24]=3[CH:29]=[CH2:30])[C:21]3[C:20](=[O:31])[N:19]([CH2:32][O:33][C:34](=[O:39])[C:35]([CH3:38])([CH3:37])[CH3:36])[C:18](=[O:40])[N:17]([CH2:42][C:43]([O:45][CH2:46][CH3:47])=[O:44])[C:16]=3[N:15]=2)[CH2:10][CH2:9]1)=[O:7])([CH3:2])([CH3:4])[CH3:3]