[C:1]1([C:7]2[C:15]3[C:14]([NH:16][CH2:17][C@@H:18]4[CH2:22][CH2:21][CH2:20][O:19]4)=[N:13][CH:12]=[N:11][C:10]=3[NH:9][C:8]=2[Si](CC)(CC)CC)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[I:30]N1C(=O)CCC1=O>CN(C=O)C>[I:30][C:8]1[NH:9][C:10]2[N:11]=[CH:12][N:13]=[C:14]([NH:16][CH2:17][C@@H:18]3[CH2:22][CH2:21][CH2:20][O:19]3)[C:15]=2[C:7]=1[C:1]1[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1A solution of 1.00 g (2.5 mmol) of (S)-[5-phenyl-6-(triethylsilanyl)-7-H-pyrrolo[2,3-d]pyrimidine-4-yl]-(tetrahydrofuran-2-ylmethyl)-amine and 830 mg (3.7 mmol) of N-iodosuccinimide in 10 ml DMF was stirred at 45° C. for 1 h. The reaction mixture was partitioned between dichloromethane (120 ml) and a 4:1 mixture of brine and saturated aqueous sodium thiosulfate (35 ml). The organic layer was washed with saturated aqueous sodium bicarbonate (1×) and brine (1×), dried over Na2SO4, filtered and concentrated. The residue was dissolved in dichloromethane (10 ml), and hexanes (200 ml) was added slowly. A solid precipitate formed. The solid was filtered off and dried under high vacuum to give the title compound. 1H-NMR (400 MHz, CDCl3) δ 1.51 (m, 1 H), 1.69-1.91 (m, 3 H), 3.19-3.69 (m, 4 H), 3.99 (m, 1 H), 5.27 (t, J=4.4 Hz, 1 H), 7.37-7.56 (m, 5 H), 8.42 (s, 1 H), 13.21 (s, 1 H). Mass Spectrum (ESI) m/e=421.0 (M+1).
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