Hydrochloric Acid → Diethyl 2-(2-benzyloxyethyl)-2-hydroxymethylmalonate

HRID 514632Notes

Reaction equation

[CH2:1]([O:8][CH2:9][CH2:10][CH:11]([C:17]([O:19][CH2:20][CH3:21])=[O:18])[C:12]([O:14][CH2:15][CH3:16])=[O:13])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[C:22](=O)(O)[O-:23].[K+].C=O.Cl>C(#N)C>[CH2:1]([O:8][CH2:9][CH2:10][C:11]([CH2:22][OH:23])([C:12]([O:14][CH2:15][CH3:16])=[O:13])[C:17]([O:19][CH2:20][CH3:21])=[O:18])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

Conditions

Temperature: 25 °C

Procedure

2.85 g (9.67 mmol equivalents) of diethyl 2-(2-benzyloxyethyl)malonate was dissolved in 20 mL of acetonitrile, 1.60 g (11.7 mmol equivalents) of potassium bicarbonate and 465 mg (11.7 mmol equivalents as formaldehyde) of paraformaldehyde were added thereto, and the mixture was stirred at room temperature (25° C.) overnight. After completion of the reaction, a 0.5 mol/L aqueous solution of hydrochloric acid was added dropwise to the reaction liquid, and the mixture was extracted three times with chloroform. The combined chloroform layers were dried with anhydrous magnesium sulfate and then concentrated under vacuum, and the obtained crude product was purified by silica gel column chromatography (eluent: hexane/ethyl acetate (v/v)=4/1) to give 2.78 g (8.76 mmol equivalents) of diethyl 2-(2-benzyloxyethyl)-2-hydroxymethylmalonate.

Workup

customAfter completion of the reaction
extractionthe mixture was extracted three times with chloroform
dry with materialThe combined chloroform layers were dried with anhydrous magnesium sulfate
concentrationconcentrated under vacuum
customthe obtained crude product
customwas purified by silica gel column chromatography (eluent: hexane/ethyl acetate (v/v)=4/1)

Sources & evidence

ORD record: ord-9878d03cb2334e3bbe1aaa2241202dc5
Source dataset: uspto-grants-2015_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09107964B2

Reaction notes

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