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ChemicalBook CAS DataBase List DIETHYL 2-BROMOETHYLPHOSPHONATE
5324-30-1

DIETHYL 2-BROMOETHYLPHOSPHONATE synthesis

7synthesis methods
-

Yield:5324-30-1 95%

Reaction Conditions:

for 2 h;Reflux;

Steps:

1.i
1,2-dibromoethane (69 ml, 0.8 mol) was poured into a two-necked 150 mL round-bottom flask. Triethylphosphite (34.3 ml, 0.2 mol) was added under stirring and the mixture was then refluxed for 2 hours. The excess of 1,2-dibromoethane was removed by rotary evaporation under gentle warming at 60-70° C. The residue was distilled under reduced pressure (2 mmHg, 95-105° C. or 1 mmHg, 75° C.). Yield 95%.1H NMR (CDCl3), δ(ppm)=4.01 (m, 4H); 3.42 (q, 2H); 2.27 (m, 2H); 1.22 (t, 6H).31P{1H} (CDCl3): δ(ppm)=26.4.

References:

NIHON MED-PHYSICS CO., LTD. US2010/160615, 2010, A1 Location in patent:Page/Page column 9

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