[N:1]1[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[CH:4]=[C:3]([CH2:11]P(=O)([O-])[O-])[CH:2]=1.[H-].[Na+].[CH:18]([C:20]1[CH:21]=[C:22]([C:26]([O:28][CH2:29][CH3:30])=[O:27])[N:23]([CH3:25])[CH:24]=1)=O.O>C1COCC1>[CH3:25][N:23]1[CH:24]=[C:20](/[CH:18]=[CH:11]/[C:3]2[CH:2]=[N:1][C:10]3[C:5]([CH:4]=2)=[CH:6][CH:7]=[CH:8][CH:9]=3)[CH:21]=[C:22]1[C:26]([O:28][CH2:29][CH3:30])=[O:27]3-Quinolinylmethylphosphonate (0.503 g, 1.93 mmol; see step (iii) above) was dissolved in anhydrous THF (2 mL) and NaH (0.273 g, 11.37 mmol) was then added in small portions to the solution and the resulting mixture was then aged for an additional 10 min. Ethyl 4-formyl-1-methyl-1H-pyrrole-2-carboxylate (0.313 g, 1.92 mmol; see Preparation 11 above) in anhydrous THF (3 mL) was added dropwise and the solution allowed to stir for 16 h. Water (5 mL) was added to the mixture (dropwise initially) during which time the sub-title compound precipitated as a yellow solid (0.201 g, 34%).
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