FC(F)(F)C(O)=O.[CH:8]1([O:13][C:14]2[NH:15][C:16]([NH2:25])=[C:17]3[C:21]([N:22]=2)=[N:20][C:19]([O:23][CH3:24])=[N:18]3)[CH2:12][CH2:11][CH2:10][CH2:9]1.Br[CH2:27][CH2:28][CH2:29][CH2:30][Cl:31]>>[Cl:31][CH2:30][CH2:29][CH2:28][CH2:27][N:20]1[C:19]([O:23][CH3:24])=[N:18][C:17]2[C:21]1=[N:22][C:14]([O:13][CH:8]1[CH2:9][CH2:10][CH2:11][CH2:12]1)=[N:15][C:16]=2[NH2:25]Prepared similarly to Intermediate 44 from 2-(cyclopentyloxy)-8-(methyloxy)-1H-purin-6-amine trifluoroacetate and 1-bromo-4-chlorobutane.
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