1,2-Dibromoethane → methyl (3S)-2,2-dimethylthiomorpholine-3-carboxylate

Participants

Reaction Steps

To a solution of 1,2-dibromoethane (6.77 g, 36 mmol) in dimethylformamide (25 ml) was added, over a period of 30 minutes, a solution of D-penicillamine methyl ester hydrochloride (6 g, 30 mmol) and 1,8-diazobicyclo[5.4.0]undeca-7-ene (13.7 g, 90 mmol) in dimethylformamide (50 ml). The resulting mixture was stirred for 18 hours at room temperature. The reaction mixture was poured into a saturated sodium bicarbonate solution and extracted with ethyl acetate. The organic layer was dried over anhydrous sodium sulfate and the solvent was removed in vacuo to give 5.5 g (97%) of the product.

Provenance & Evidence