[F:1][C:2]1[CH:9]=[C:8]([N:10]2[CH:14]=[CH:13][CH:12]=[N:11]2)[CH:7]=[CH:6][C:3]=1[CH:4]=O.[Br-].[O:16]1CCO[CH:17]1[CH2:21][P+](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.COCCOCCN(CCOCCOC)CCOCCOC>ClCCl.C([O-])([O-])=O.[K+].[K+]>[F:1][C:2]1[CH:9]=[C:8]([N:10]2[CH:14]=[CH:13][CH:12]=[N:11]2)[CH:7]=[CH:6][C:3]=1/[CH:4]=[CH:21]/[CH:17]=[O:16]
A mixture of 2-fluoro-4-(1H-pyrazol-1-yl)benzaldehyde (1.06 g, 5.57 mmol, prepared as described in Reference Example 8), (1,3-dioxolan-2-ylmethyl)triphenylphosphonium bromide (3.60 g, 8.39 mmol), and TDA-1 (1.80 mL, 5.63 mmol) in dichloromethane (30 mL) and sat. aq. K2CO3 (30 mL) was heated to reflux for 20 h. The layers were separated and the aqueous layer was extracted with dichloromethane (2×15 mL). The combined organic layers were washed with water (30 mL) and brine (30 mL), dried (Na2SO4), and concentrated. THF (15 mL) and 10% HCl (15 mL) were added and the mixture was stirred for 1 h at rt. The mixture was cooled to 0° C., the precipitated solids were removed by filtration, washed with water and dried in vacuo. Recrystallization from IPA provided 0.84 g (70%) of the title compound as tan needles. MS 217 (M+H)+.
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