Chloroacetic Acid → BnO-PEG5-CH2COOH

HRID 1162953Notes

Reaction equation

N[C@H](C=O)CCSC.[CH2:9]([O:16][CH2:17][CH2:18][O:19][CH2:20][CH2:21][O:22][CH2:23][CH2:24][O:25][CH2:26][CH2:27][O:28][CH2:29][CH2:30][OH:31])[C:10]1[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=1.Cl[CH2:33][C:34]([OH:36])=[O:35]>O>[CH2:9]([O:16][CH2:17][CH2:18][O:19][CH2:20][CH2:21][O:22][CH2:23][CH2:24][O:25][CH2:26][CH2:27][O:28][CH2:29][CH2:30][O:31][CH2:33][C:34]([OH:36])=[O:35])[C:10]1[CH:11]=[CH:12][CH:13]=[CH:14][CH:15]=1

Participants

Conditions

Temperature: 90 °C

Procedure

Metal sodium (115 mg, 5.0 mmol) was added to pentaethylene glycol monobenzyl ether (328 mg, 1.0 mmol), and the mixture was stirred at 90° C. for three hours. Chloroacetic acid (47 mg, 0.5 mmol) was added to the mixture which was then stirred at 90° C. for 16 hours. Water was added to the mixture which was then washed with ethyl acetate. Next, the aqueous layer was made acidic by 1 N hydrochloric acid, followed by extraction with ethyl acetate. The extract was dried over anhydrous sodium sulfate, and then the solvent was evaporated under reduced pressure to obtain 390 mg of crude [2-(2-{2-[2-(2-benzyloxyethoxy)ethoxy]ethoxy}ethoxy)ethoxy]acetic acid in the form of a reddish brown substance.

Workup

stirringwas then stirred at 90° C. for 16 hours
washwas then washed with ethyl acetate
extractionfollowed by extraction with ethyl acetate
dry with materialThe extract was dried over anhydrous sodium sulfate
customthe solvent was evaporated under reduced pressure

Sources & evidence

ORD record: ord-3c73672c523748d49daad8324589ac51
Source dataset: uspto-grants-2010_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07820693B2

Reaction notes

Loading…