Bromotrimethylsilane → [Bromo(Phenyl)Methyl]Phosphonic Acid

5 (0.3 g, 1.08 mmol, 1 eq) was dissolved in dry DCM (5 mL). TMSBr (1.2 mL, 8.64 mmol, 8 eq) was added under an inert atmosphere. The reaction was stirred for 20 h at room temperature. The solvent was then evaporated, and MeOH (5 mL) was added to the reaction mixture and stirred for 1 h. The solvent was evaporated and the crude product was dissolved in water (5 mL), filtered and freeze dried yielding 7 as a white powder (229 mg, 85%). 1H NMR (400 MHz, D2O) δ 7.61-7.52 (m, 2H), 7.44-7.33 (m, 3H), 5.10-5.02 (m, 1H). 13C NMR (101 MHz, D2O) δ 136.49 (d, JC-P=3.3 Hz), 129.35 (d, JC-P=6.0 Hz), 129.09 (s), 43.54 (s). 31P NMR (162 MHz, D2O) δ 15.44 (s). ESIMS calculated for C7H7BrO3P [M-H]− 248.93, found: 248.93 mp 158-60° C.

1. customThe solvent was then evaporated
2. additionMeOH (5 mL) was added to the reaction mixture
3. stirringstirred for 1 h
4. customThe solvent was evaporated
5. dissolutionthe crude product was dissolved in water (5 mL)
6. filtrationfiltered
7. customfreeze dried

ORD record

ord-653874b1de194e68bca2aa9d4b9e6d24

Source dataset

uspto-grants-2016_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09399653B2