Water → HCID 21191969, compound

Participants

Reaction Steps

2-Hydroxy-3,6-di-hydroxycarbonylnaphthalene (11.8 g) was dissolved in chloroform (300 g) and dimethyl sulfoxide (100 g), followed by ice-cooling. Then, a solution of bromine (8.0 g) and chloroform (50 g) was added dropwise at not more than 5° C. over 2 hours. After continuously stirring for 1 hour, this solution was poured into water (1500 g) dropwise. The deposit was filtered and then washed with water and dispersed in a small amount of methanol. The dispersion was concentrated under reduced pressure at room temperature and then dried under vacuum to obtain 15.1 g of 1-bromo-2-hydroxy-3,6-di-hydroxycarbonylnaphthalene as a whitish brown crystal (DSC analysis value: 145.2° C.).

Provenance & Evidence