HCID 121714, compound → L-cysteinesulfinic acid

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Reaction Steps

This cystine disulfoxide (13.6 g, 0.05 mols) was dissolved in 250 ml of formic acid. The solution was passed through 150 ml of a Diaion SK1B column, and washed with 300 ml of water. A solution of 11.4 g of sodium hydroxide in 200 ml of water was passed through this resin column, and then washed with 150 ml of water. Subsequently, a solution of 17.5 g of a 25% aqueous ammonia in 200 ml of water was passed through the resin column, and then washed with water. This eluate was passed through 150 ml of a Diaion WK-10 column. The resulting eluate was concentrated, crystallized, filtered and dried to obtain 8.7 g of cysteinesulfinic acid (yield: 85%).

Provenance & Evidence