Triethylamine → Ethyl 3-ethoxycarbonyloxy-1,4-dihydro-1,4-dioxo-2-naphthoate

Reaktionsgleichung

[OH:1][C:2]1[C:11](=[O:12])[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[C:4](=[O:13])[C:3]=1[C:14]([O:16][CH2:17][CH3:18])=[O:15].C(N(CC)CC)C.Cl[C:27]([O:29][CH2:30][CH3:31])=[O:28]>O1CCCC1>[CH2:30]([O:29][C:27]([O:1][C:2]1[C:11](=[O:12])[C:10]2[C:5](=[CH:6][CH:7]=[CH:8][CH:9]=2)[C:4](=[O:13])[C:3]=1[C:14]([O:16][CH2:17][CH3:18])=[O:15])=[O:28])[CH3:31]

Komponenten

Versuchsvorschrift

To a solution of 2.48 g of ethyl 3-hydroxy-1,4-dihydro1,4-dioxo-2-naphthoate and 1.5 ml of triethylamine in 10 ml of dry tetrahydrofuran was added dropwise 1 ml of ethyl chloroformate at 5° C. or below, and the mixture was stirred at room temperature for 2 hours. The resulting solid was removed by filtration, and the filtrate was evaporated to dryness to give crude ethyl 3-ethoxycarbonyloxy-1,4-dihydro-1,4-dioxo-2-naphthoate.