Diethyl Ether → Methyl 5-chloro-1-methyl-1H-pyrrole-3-carboxylate

Participants

Reaction Steps

Methyl 5-chloropyrrole-3-carboxylate (800 mg., 5 mmoles) was dissolved in 75 ml. of ether. Sodium hydride (57% dispersiion in oil, 430 mg., 10 mmoles) was added and the mixture stirred under nitrogen for 1 hour. Dimethyl sulfate (1 ml., 10.7 mmoles) was added and stirring continued for 2 hours. Excess sodium hydride was decomposed by cautious addition of 20 ml. of water. The ether phase was washed with 20 ml. of water and evaporated to yield methyl 1-methyl-5-chloropyrrole-3-carboxylate (oil); the entire batch being used directly in the next step.

Provenance & Evidence