Nitric Acid → HCID 21506794, compound

Participants

Reaction Conditions

Reaction Steps

A total of 14.1 grams (0.06 M) of 2,3-dihydrospiro-[naphthalene-1(4H),3'-piperidine]-2',4,6'-trione was added in small portions to 100 milliliters of nitric acid (d = 1.4) cooled to -5° to -10° C. This temperature was maintained for 15 minutes and then allowed to warm to 0° C. The reaction mixture was poured into an ice-water mixture and filtered. The precipitate was recrystallized from aqueous acetone and then from acetic acid and then from an acetone-isopropyl alcohol-ethyl acetate mixture. Recrystallization from dioxane followed by chromatrographic purification from a silica gel column (eluted by dioxane) gave 2,3-dihydro-6-nitrospiro-[naphthalene-1(4H),3'-piperidine]-2',4,6'-trione, melting point 273°-275° C.

Provenance & Evidence