Diethyl chlorophosphate → HCID 86603461, compound

Participants

Reaction Conditions

Reaction Steps

To a stirring solution of (2,6-dimethyl-4-methanesulfonylphenoxy)triisopropylsilane (0.47 g, 1.32 mmol) in THF (15 mL) at −78° C. was added n-BuLi (2.5 M in hexanes, 0.58 mL), the reaction mixture was stirred at −78° C. for 1 hr, then diethyl phosphorochloridate (0.25 mL, 1.72 mmol) was added at −78° C. The reaction mixture was stirred at room temperature for 16 hrs. The reaction mixture was quenched with saturated NH4Cl and diluted with diethyl ether. The organic layer was dried over Na2SO4, filtered and concentrated under reduced pressure. The residue was purified by column chromatography on silica gel, eluting with ethyl acetate-hexanes (1:1) to afford diethyl (3,5-dimethyl-4-triisopropylsilanyloxy-benzenesulfonyl)methylphosphonate as a colorless oil (0.1 g, 15%): 1H NMR (200 MHz, CDCl3-d6): δ 7.57 (s, 2 H), 4.17 (m, 4 H), 3.71 (d, J=17.2 Hz, 2 H), 2.29 (s, 6 H), 1.33 (m, 9 H), 1.10 (d, J=7.2 Hz, 18 H). TLC conditions: Uniplate silica gel, 250 microns; Mobile phase=ethyl acetate-hexanes (1:1); Rf=0.45.

Provenance & Evidence