Sodium Hydroxide → HCID 19913960, compound

Participants

Reaction Conditions

Reaction Steps

92.4 g (0.4 mol) of crude 1-nitroso-6-methoxycarbonyl-β-naphthol were added at room temperature to a solution of 360 g (1.11 mol) of 40%-strength aqueous sodium hydrogen sulfite and 4.4 g (0.11 mol) or sodium hydroxide in 1610 ml of water. The suspension was heated for 24 h at 40° C. and then 2.4 g; (2.6% of the amount taken) of residue were separated off. The clear solution was then acidified at 25° C. with 142 g (1.39 mol) of 36%-strength sulfuric acid and the product was crystallized out for 48 hours at room temperature. After filtration by suction and drying, 76.0 g (64%) of product is obtained.

Provenance & Evidence