Hydrochloric Acid → HCID 19423107, compound

A solution of 2-bromo ethanol (1.42 mL, 20 mmol) and dry pyridine (3.23 mL, 40 mmol) in dry dichloromethane (25 mL) was cooled to 0° C. Diethyl chlorophosphate (3.36 mL, 23 mmol) was added dropwise and the reaction mixture was stirred at room temperature for 24 h. Diethyl ether (40 mL) and 1 N HCl (40 mL) were added and the organic layer was separated and washed consecutively with 1 N HCl and saturated NaHCO3 and dried over MgSO4. After evaporation of the solvents the residue was purified by column chromatography (silica gel, ethyl acetate/pentane 1:1) to give the product (4.85 g, 18.6 mmol, 93%) as light yellowish oil. 1H NMR (CDCl3, 400 MHz) δ=1.34 (dt, 6H, 2×CH3, 3J(H,H)=7.2 Hz, 4J(H,P)=1.2 Hz); 3.52 (t, 2H, CH2Br, 3J=6 Hz); 4.13 (dq, 4H, 2×CH2CH3, 3J(H,H)=7.2 Hz, 3J(H,P)=7.2 Hz); 4.28 (dt, 4H, 2×OCH2CH2Br, 3J(H,H)=6.4 Hz, 3J(H,P)=8.4 Hz). 13C NMR (CDCl3, 100.5 MHz) δ=16.0 (d, 2×CH3, 3J=6.8 Hz); 29.4 (d, CH2Br, 2J=7.6 Hz); 64.0 (d, OCH2, 2J=5.3 Hz); 66.5 (d, OCH2, 2J=5.3 Hz).

1. customthe organic layer was separated
2. washwashed consecutively with 1 N HCl and saturated NaHCO3
3. dry with materialdried over MgSO4
4. customAfter evaporation of the solvents the residue
5. customwas purified by column chromatography (silica gel, ethyl acetate/pentane 1:1)

ORD record

ord-724b2bb136a94e0caa88494af4778638

Source dataset

uspto-grants-2013_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08436138B2