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A stirred, cooled (−78° C.) solution of triethyl-2-phosphonopropionate (10 g, 41.9 mmol) in anhydrous tetrahydrofuran (100 mL) was treated with a 1.6M solution of n-butyl lithium in hexanes (25 mL, 40 mmol). After 10 min, the reaction mixture was cannulated into a cooled (−78° C.) solution of 4-iodo-benzaldehyde (4.66 g, 20 mmol) in tetrahydrofuran (25 mL). After 30 minutes, it was quenched with saturated aqueous ammonium chloride solution and extracted with diethyl ether (×2). The combined organic phase was dried over anhydrous magnesium sulfate, filtered and evaporated in vacuo to afford an oil that was subjected to flash column chromatography over silica gel (230–400 mesh) using 9–10% ethyl acetate in hexane as the eluent to afford the title compound (6.3 g, 99%).

1. waitAfter 30 minutes
2. customit was quenched with saturated aqueous ammonium chloride solution
3. extractionextracted with diethyl ether (×2)
4. dry with materialThe combined organic phase was dried over anhydrous magnesium sulfate
5. filtrationfiltered
6. customevaporated in vacuo
7. customto afford an oil that