Methyl rac-1',2',3',4',5',5a',6',11',11a',12'-decahydro-6',11'-diacetoxy-5',12'-dioxospiro[1,3-dithiolane-2,4'-naphthacene]-2'-carboxylate → Methyl rac-1',2',3',4',5',12'-hexahydro-5',12'-dioxospiro[1,3-dithiolane-2,4'-naphthacene]-2'-carboxylate
Reaktionsgleichung
C(O[CH:5]1[C:22]2[C:17](=[CH:18][CH:19]=[CH:20][CH:21]=2)[CH:16](OC(=O)C)[CH:15]2[CH:6]1[C:7](=[O:36])[C:8]1[C:9]3([S:35][CH2:34][CH2:33][S:32]3)[CH2:10][CH:11]([C:28]([O:30][CH3:31])=[O:29])[CH2:12][C:13]=1[C:14]2=[O:27])(=O)C>C1(C)C(C)=CC=CC=1>[O:36]=[C:7]1[C:6]2[C:15](=[CH:16][C:17]3[C:22]([CH:5]=2)=[CH:21][CH:20]=[CH:19][CH:18]=3)[C:14](=[O:27])[C:13]2[CH2:12][CH:11]([C:28]([O:30][CH3:31])=[O:29])[CH2:10][C:9]3([S:32][CH2:33][CH2:34][S:35]3)[C:8]1=2Komponenten
3
Edukt 1
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Versuchsvorschrift
(a) A solution of 32 mg (0.06 mmol) of methyl rac-1',2',3',4',5',5a',6',11',11a',12'-decahydro-6',11'-diacetoxy-5',12'-dioxospiro[1,3-dithiolane-2,4'-naphthacene]-2'-carboxylate in 2 ml of dry xylene was stirred and heated under reflux under an atmosphere of nitrogen for 20 hours. The solution was then evaporated to dryness to give 24 mg (97%) of methyl rac-1',2',3',4',5',12'-hexahydro-5',12'-dioxospiro[1,3-dithiolane-2,4'-naphthacene]-2'-carboxylate in the form of a bright yellow solid of melting point 216° C.