Diethyl Oxalate → HCID 55269669, compound

Participants

Reaction Conditions

Reaction Steps

A Grignard reagent prepared from 1-bromo-4-methylcyclohexane (20.0 g, 0.11 mol) and magnesium (2.9 g, 0.12 mol) in THF (110 ml) was added dropwise (during a period of 80 min) to a mechanically stirred solution of diethyl oxalate (16.0 g, 0.11 mol) in THF (250 ml) at −78° C. The mixture was left stirring for 2 h and then slowly warmed up to 0° C. A saturated solution of NH4Cl (100 ml) was added and the formation of a white precipitate was observed. Extraction with diethyl ether (2×), washing with water, drying (Na2SO4) and concentrating afforded 22.6 g of the crude compound. Kugelrohr distillation of 10 g (100° C./2 mbar) gave 7.74 g (76%) of ethyl 2-(4-methylcyclohexyl)-2-oxoacetate as a slightly yellow oil (mixture of cis/trans isomers ca. 1:3).

Provenance & Evidence