2,2,2-Trichloroethyl chloroformate → N-(beta,beta,beta-trichloroethoxycarbonyl)-3-pyrroline

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Reaction Steps

40.0 g (0.25 mol) of N-benzyl-3-pyrroline are dissolved in 400 ml of benzene. 53.0 g (0.25 mol) of 2,2,2-trichloroethyl chloroformate are introduced into this solution in the course of 30 minutes, at 0° and under a nitrogen atmosphere. The reaction mixture is stirred for a further 1 hour at 0°, then washed at room temperature twice with, in each case, 100 ml of a mixture of water and 2 N hydrochloric acid (3:1) and then twice with water, dried over sodium sulphate and evaporated under a water pump vacuum. The oily residue is distilled under a high vacuum and, after 24 g of benzyl chloride has been separated off, N-(β,β,β-trichloroethoxycarbonyl)-3-pyrroline with a boiling point of 84°-85° C./0.12 mm Hg is obtained.

Provenance & Evidence