[OH:1][C:2]1[N:6]([C:7]2[CH:12]=[C:11]([C:13]#[N:14])[CH:10]=[CH:9][N:8]=2)[N:5]=[CH:4][CH:3]=1.[C:15]1([CH2:21]O)[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1.C1C=CC(P(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.CC(OC(/N=N/C(OC(C)C)=O)=O)C>C1COCC1.O>[CH2:21]([O:1][C:2]1[N:6]([C:7]2[CH:12]=[C:11]([C:13]#[N:14])[CH:10]=[CH:9][N:8]=2)[N:5]=[CH:4][CH:3]=1)[C:15]1[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1
To a solution of 2-(5-hydroxy-1H-pyrazol-1-yl)pyridine-4-carbonitrile (186 mg, 1 mmol), phenylmethan-1-ol (216 mg, 2 mmol), and PPh3 (523 mg, 2 mmol) in THF (10 mL) was added dropwise DIAD (402 mg, 2 mmoL) at 0° C. under N2. Then the mixture was stirred at rt overnight. Water was added, and the reaction mixture was extracted with EtOAc, then washed with water and brine. The organic phase was dried, concentrated, and purified by prep-HPLC to afford the title compound (60 mg). 1H NMR (400 MHz, CDCl3): δ 5.25 (2H, s), 5.75 (1H, d, J=2.0 Hz), 7.36-7.44 (5H, m), 7.57 (1H, d, J=2.0 Hz), 8.04 (1H, s), 8.71 (1H, d, J=5.2 Hz). [M+H] Calc'd for C16H12N4O, 277; Found, 277.
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