Tetraethylammonium acetate → 2,4,6-Triiodoisophthalamide
反応式
ICC1CCC(=O)N1[C:9]1[C:10]([I:23])=[C:11]([C:20]([NH2:22])=[O:21])[C:12]([I:19])=[C:13]([C:16]([NH2:18])=[O:17])[C:14]=1[I:15].C([O-])(=O)C.C([N+](CC)(CC)CC)C>C(#N)C>[I:19][C:12]1[C:13]([C:16]([NH2:18])=[O:17])=[C:14]([I:15])[CH:9]=[C:10]([I:23])[C:11]=1[C:20]([NH2:22])=[O:21]参加物
4
実験手順
To a solution of N,N'-bis[2-(acetyloxy)-1-(acetyloxy)methyl]ethyl]-5-[2-(iodomethyl)-5-oxo-1-pyrrolidinyl]-2,4,6-triiodo-1,3-benzenedicarboxamide (12.00 g, 110 mmol) in acetonitrile (150 ml) was added tetraethylammonium acetate (5.74 g, 22 mmol) and the mixture stirred at 50° for 18 hours. Acetonitrile was removed in vacuo at 60°, the residue dissolved in ethyl acetate (200 ml), and the resulting solution washed with brine (2×100 ml) and with water (100 ml). The ethyl acetate layer was dried and removal of the solvent afforded the crude product as a colorless glassy solid. This material was purified by column chromatography over silica gel, using 20% hexane in ethyl acetate as eluent, to obtain N, N-bis[2-(acetyloxy)-1-[(acetyloxy)methyl]ethyl]-5-[2-(acetyloxy)methyl)-5-oxo-1-pyrrolidinyl]-2,4,6-triiodo-1,3-benzenedicarboxamide as a colorless solid (9.4 g, 83.6% yield).