[C:1]([CH:5]1[C:14]2[C:9](=[CH:10][CH:11]=[CH:12][CH:13]=2)[CH2:8][CH2:7][C:6]1=O)([O:3][CH3:4])=[O:2].C(O)(=O)C(C)C.[CH2:22]([NH2:29])[C:23]1[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1.O>C1(C)C=CC=CC=1>[C:1]([C:5]1[C:14]2[C:9](=[CH:10][CH:11]=[CH:12][CH:13]=2)[CH2:8][CH2:7][C:6]=1[NH:29][CH2:22][C:23]1[CH:28]=[CH:27][CH:26]=[CH:25][CH:24]=1)([O:3][CH3:4])=[O:2]To a solution of 1-carbomethoxy-2-oxo-1,2,3,4-tetrahydronaphthalene (10.2 g) and isobutyric acid (4.84 g) in toluene (150 mL) stirring at room temperature under argon, was added benzylamine (5.35 g). The resulting mixture was heated to reflux for 2 h with water removal using a Dean-Stark trap. The solvent was then evaporated under vacuum to provide the title compound (15 g) as a yellow gum.
Wird geladen…