[OH:1][CH2:2][C:3]1[CH:11]=[CH:10][C:6]([C:7]([NH2:9])=[O:8])=[CH:5][N:4]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.O[N:32]1[C:36](=[O:37])[C:35]2=[CH:38][CH:39]=[CH:40][CH:41]=[C:34]2[C:33]1=[O:42].N(C(OC(C)C)=O)=NC(OC(C)C)=O>O.C(OCC)(=O)C.C1COCC1>[O:42]=[C:33]1[C:34]2[C:35](=[CH:38][CH:39]=[CH:40][CH:41]=2)[C:36](=[O:37])[N:32]1[O:1][CH2:2][C:3]1[CH:11]=[CH:10][C:6]([C:7]([NH2:9])=[O:8])=[CH:5][N:4]=1To a mixture of 313 mg of 6-(hydroxymethyl)nicotinamide, 540 mg of triphenylphosphine, 503 mg of N-hydroxyphthalimide, and 4.7 ml of THF was added dropwise 0.53 ml of diisopropyl azodicarboxylate, followed by stirring overnight. After concentration, the solid thus produced was suspended in water, and ethyl acetate was added thereto. After stirring for 30 minutes, the solid was collected by filtration to obtain 292 mg of 6-{[(1,3-dioxo-1,3-dihydro-2H-isoindo1-2-yl)oxy]methyl}nicotinamide.
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