Water → HCID 23075071, compound

Participants

Reaction Conditions

Reaction Steps

1,4-Dihydroxy-2,3-dihydro-6-carboxy-anthraquinone (300 mg) Boric acid (300 mg) and p-Toluidine (1.8 g) is mixed in n-pentanol (5 mL) and heated to 110° C. for 4 hours, the mixture is co-evaporated with 2×50 ml of water. The residue is redissolved in dichloromethane/THF (1/1) 200 ml washed with water (3×100 mL) dried (Na2SO4), filtered and concentrated. The residue is purified on a silicagel column (CH2Cl2/MeOH/NEt3; 90/9/1) resulting in 350 mg of pure material. MALDI-MS: m/z 463.2 (M+H)

Provenance & Evidence