Ethanesulfonyl chloride, 1,2-dichloro- synthesis

Yield:84501-81-5 31%

Reaction Conditions:

with tetrachloromethane at 20; for 5 h;Irradiation;

Steps:

3 1,2-Dichloroethanesulfonyl chloride

1,2-Dichloroethanesulfonyl chloride. A stirred solution of chlorine in a solution of ethenesulfonyl chloride (32 g, 0.25 mol) in carbon tetrachloride was irradiated at about room temperature (200W light) for 5 h. The reaction mixture was concentrated under reduced pressure (50 mm Hg) and the involatile residue was fractionally distilled to give 1,2-dichloroethanesulfonyl chloride (Goldstein et al. Zh. Obshch. Khim., 28, 1958, 2107) (15,5 g, 31%), b. p. 75 °C/0. 7 mm Hg. 1H-NMR (CDCl3) δ 5.29 (dd, J = 8.9 and 3.3 Hz, 1H), 4.40 (dd, J = 12.4 and 3.3 Hz, 1H), and 3.97 (dd, J = 12.4 and 8.9 Hz, 1H).

References:

WO2004/48350,2004,A2 Location in patent:Page 65