Triethylamine → 1-(2-Hydroxy-4-nitrophenyl)-3-phenylthiourea

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N-(2-Hydroxy-4-nitrophenyl)-N′-phenyl-2-thiourea was prepared by treating a solution of N-(2-tert-butyldimethysilyloxy-4-nitrophenyl)-N′-phenyl-thiourea (103 mg, 0.248 mmol) in CH3CN (1 mL) with Et3N.HF (100 uL, 0.62 mmol) in acetonitrile for 10 minutes at 23° C. The solution was concentrated and flushed through a silica pIug with EtOAc to afford the desired compound as an orange solid (55 mg, 77%). mp: 144-145° C.; 1H NMR (CD3OD/CDCl3): d 8.65 (d, 1H, J=10.0 Hz), 7.58 (d, 1H, J=10.0 Hz), 7.47 (d, 1H, J=1.25 Hz), 7.26 (m, 4H), 7.10 (m, 1H).

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