Dimethylformamide → HCID 21491883, compound

Participants

Reaction Steps

To a mixture of phosphoryl chloride (3.53 g.) and dimethylformamide (1.68 g.) at 0° C was added a cooled solution of ethyl 2,4-dioxo-6-p-tolylcyclohexanecarboxylate (6.2 g.) a dione of formula II prepared as in Example 1, in dichloromethane (60 ml.). After keeping at 0° C for 30 minutes the mixture was poured into excess 2N-Na2CO3 solution and extracted with ether. After washing the ether extracts with water and drying over magnesium sulphate, evaporation of the solvents gave crude ethyl 4-chloro-2-oxo-6-p-tolyl-3-cyclohexenecarboxylate (a halide of formula IV) as a pale yellow oil.

Provenance & Evidence