4-Mercaptobenzoic acid → HCID 13325393, compound

Participants

Reaction Steps

To 19.8 g. of sodium salt of paracarboxythiophenol in dimethylformamide solution was added 29.5 g of tri-O-acetyl-α-D-xylosylchloride (4). After the resulting reaction mixture was allowed to stand overnight, the dimethylformamide was distilled away and the resulting residue was extracted with ethyl acetate. The obtained organic layer was washed with water, followed by drying over anhydrous magnesium sulfate. When the solvent was distilled away, white powdery paracarboxyphenyl 2,3,4-tri-O-acetyl-1-thio-β-D-xylopyranoside (10) was obtained. To 144 ml. of anhydrous methanol were added 12.0 g. of the obtained paracarboxyphenyl 2,3,4-tri-O-acetyl-1-thio-β-D-xylopyranoside (10) and 720 mg. of lithium hydroxide, and the mixture was allowed to stand overnight at room temperature. Then, the reaction mixture was diluted with water and was passed through an acidic resin in the usual way. The solution which has thus been passed was adjusted to pH 7.0 by adding sodium hydroxide. The so neutralized solution was concentrated to yield 8 g. of the desired para(sodiumoxycarbonyl)phenyl 1-thio-β-D-xylopyranoside in the state of white powder.

Provenance & Evidence