Ethyl Acetate → HCID 22028204, compound

To a cold (0° C.) suspension of NaH (2.68 g, 60%) in THF (150 mL) was added a solution of 1,1-diethoxyethanol [which was prepared according to the literature procedure of Zirkle, C. L. et. al. J. Org. Chem. 1961, 26, 395-407] (9.00 g) in THF (20 mL), and the reaction mixture was stirred at room temperature for 1 hour before adding methallyl chloride (8.0 mL). The reaction mixture was heated to reflux overnight, cooled and filtered through a plug of celite. Solvent was removed by rotary evaporation, and the residue purified by column chromatography (silica, 20% ether/hexane) to give 1,1-diethoxyethylmethallyl ether (11.5, 90%). Ozonolysis of a chilled (−30° C.) solution of this ether (6.00 g) in EtOAc (80 mL) was carried out until no starting material was detectable by TLC (1 hour). At this time, the reaction was purged with oxygen, treated with Pd(OH)2 (150 mg) and stirred under an atmosphere of hydrogen overnight. The catalyst was filtered away, and the filtrate was concentrated by rotary evaporation. The resulting residue was purified by column chromatography (silica, 20% EtOAc/hexane) to afford (1,1-diethoxy-ethoxy)acetone (4.53 g, 82%).

1. customwas detectable by TLC (1 hour)
2. customAt this time, the reaction was purged with oxygen
3. additiontreated with Pd(OH)2 (150 mg)
4. filtrationThe catalyst was filtered away
5. concentrationthe filtrate was concentrated by rotary evaporation
6. customThe resulting residue was purified by column chromatography (silica, 20% EtOAc/hexane)

ORD record

ord-7d7344e80ade4997b16525a801519d5e

Source dataset

uspto-grants-2005_01

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06841567B1