[CH3:1][S:2][C:3]1[N:8]=[CH:7][C:6]([CH:9]([C:11]2[C:19]3[CH:18]=[N:17][CH:16]=[N:15][C:14]=3[N:13]([Si](C(C)C)(C(C)C)C(C)C)[CH:12]=2)O)=[CH:5][N:4]=1.C([SiH](CC)CC)C.FC(F)(F)C(O)=O>ClCCCl>[CH3:1][S:2][C:3]1[N:4]=[CH:5][C:6]([CH2:9][C:11]2[C:19]3[CH:18]=[N:17][CH:16]=[N:15][C:14]=3[NH:13][CH:12]=2)=[CH:7][N:8]=1
To a solution of (2-methylsulfanyl-pyrimidin-5-yl)-(7-triisopropylsilanyl-7H-pyrrolo[2,3-d]pyrimidin-5-yl)-methanol (55, 2.75 g, 6.40 mmol) in 50.0 mL of 1,2-dichloroethane, triethylsilane (8.00 mL, 50.1 mmol) and trifluoroacetic acid (4.00 mL, 51.9 mmol) were added. The reaction was heated at 80° C. overnight, then concentrated under vacuum, combined with water and extracted with ethyl acetate. The organic layer was dried over sodium sulfate, filtered, and the filtrate was concentrated under vacuum. The resulting material was purified by silica gel column chromatography eluting with 2-15% methanol in dichloromethane. Appropriate fractions were combined and the solvents removed under vacuum to provide the desired compound (56, 1.20 g). MS (ESI) [M+H+]+=258.2.
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