ClC(Cl)(Cl)C(Cl)(Cl)Cl.[F:9][C:10]1[CH:11]=[CH:12][C:13]([NH:16][NH:17][C:18]([C:20]2([N:25]([CH3:27])[CH3:26])[CH2:24][CH2:23][CH2:22][CH2:21]2)=O)=[N:14][CH:15]=1.C(N(CC)CC)C.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>C1COCC1>[F:9][C:10]1[CH:11]=[CH:12][C:13]2[N:14]([C:18]([C:20]3([N:25]([CH3:27])[CH3:26])[CH2:24][CH2:23][CH2:22][CH2:21]3)=[N:17][N:16]=2)[CH:15]=1
Hexachloroethane (503 mg, 2.12 mmol) was added portionwise over 5 minutes at RT to a stirred mixture of Intermediate 99b (282 mg, 1.06 mmol), triethylamine (5904, 4.24 mmol) and triphenylphosphine (555 mg, 2.12 mmol) in THF (11 mL). The reaction mixture was stirred at 50° C. for 2.5 h and then partitioned between EtOAc and water. The aqueous phase was extracted with EtOAc (×3) and the combined organic layers were washed with brine, dried (MgSO4) and concentrated in vacuo. The resultant residue was purified by FCC using SCX-2 cartridge. The cartridge was washed with MeOH and the product was eluted with 2M NH3 in MeOH to give the title compound (207 mg, 79%). 1H NMR (400 MHz, CDCl3): 1.67-1.78 (4H, m), 2.10-2.22 (8H, m), 2.24-2.34 (2H, m), 7.15 (1H, ddd, J=10.0, 7.4, 2.3 Hz), 7.69 (1H, dd, J=10.0, 5.0 Hz), 8.65-8.68 (1H, m).
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