1H,3H-Naphtho[1,8-cd]pyran-1,3-dione, 6-chloro- → 6-chloro-2-hydroxy-1H-benzo[de]isoquinoline-1,3(2H)-dione

Participants

Reaction Steps

4-Chloro-1,8-naphthalic anhydride (1.4 g, 6.0 mmol) and hydroxylamine hydrochloride (0.8 g, 11.5 mmol) were reacted in pyridine (50 mL) following the procedure of Example 1 to give 1.2 g of the title compound, mp 234-236° C.;

Provenance & Evidence