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4-Fluorobenzylphosphonic acid synthesis

2synthesis methods
-

Yield:80395-14-8 57%

Reaction Conditions:

with triethyl phosphite

Steps:

9 Diethyl, 4-fluorobenzylphosphonate (17)

EXAMPLE 9 Diethyl, 4-fluorobenzylphosphonate (17) A mixture of 4-fluorobenzyl bromide 16 (1.89 g, 10 mmol) and triethyl phosphite (1.66 g, 10 mmol) was stirred at 170° C. for 4 h. The mixture was cooled to room temperature. and the residue was subjected to flash chromatography (EtOAc: Hex, 1:4) to gave 1.4 g of 17(57%). 1H NMR (200 MHz, CDCl3): δ1.23 (t, J=7.1 Hz, 6H), 3.10 (d, J=21.4 Hz, 2H), 3.92 (q, J=7.1 Hz, 4H), 7.02 (m, 2H), 7.25 (m, 2H).

References:

US2003/149250,2003,A1