Water → Levamisole

Participants

Reaction Conditions

Reaction Steps

To a refluxing solution of 20.43 g of tetramisole (0.1 mol) in 190 ml of 2-propanone and 10 ml. of water was added 15.9 g of L-N-[(4-methoxyphenyl)sulfonyl]glutamic acid (0.05 mol). The mixture was refluxed for another 5 minutes and cooled to 15° C. After 12 hours the precipitate was filtered off, washed with 2-propanone and dried under vacuo at 70° C., yielding 23.88 g of levamisole.L-N-[(4-methoxyphenyl)sulfonyl]glutamic acid (salt) (yield=91.6%) αD20 =-63.5° (c5, 1N HCl); mp. 127.6°-129.3° C.

Provenance & Evidence