[Cl:1][C:2]1[C:3]([CH3:20])=[C:4]([S:8]([NH:11][C:12]2[S:13][CH:14]=[C:15]([CH2:17][CH2:18]O)[N:16]=2)(=[O:10])=[O:9])[CH:5]=[CH:6][CH:7]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C(Cl)(Cl)(Cl)[Cl:41].O>CN(C=O)C>[Cl:1][C:2]1[C:3]([CH3:20])=[C:4]([S:8]([NH:11][C:12]2[S:13][CH:14]=[C:15]([CH2:17][CH2:18][Cl:41])[N:16]=2)(=[O:10])=[O:9])[CH:5]=[CH:6][CH:7]=1A mixture of EXAMPLE 181A (100 mg, 0.30 mmol), triphenylphosphine (158 mg, 0.60 mmol) and carbontetrachloride (116 mg, 0.75 mmol) in DMF (2 mL) was stirred over night, and was then poured into water. The mixture was extracted with EtOAc, dried (Sodium sulfate) and the solvent was evaporated. The crude material was purified by flash chromatography on silica gel gradient eluting with 2-4% acetone in DCM giving a solid (25 mg, 24%). 1H NMR (CDCl3) δ 2.64 (s, 3H), 3.17 (t, 2H), 3.77 (t, 2H), 6.30 (s, 1H), 7.24 (m, 2H), 7.56 (d, 1H), 8.02 (d, 1H); MS (Ionspray, [M+H]+) m/z 350.
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