Potassium Carbonate → N-((4S)-2-amino-7'-methoxyspiro[1,3-oxazole-4,9'-xanthen]-2'-yl)-5-chloro-2-pyridinecarboxamide
反応式
[Cl:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]([NH:10][C:11]2[CH:24]=[C:23]3[C:14]([O:15][C:16]4[CH:17]=[CH:18][C:19]([O:36][CH3:37])=[CH:20][C:21]=4[C@@:22]43[CH2:28][O:27][C:26]([NH:29]C(=O)C(F)(F)F)=[N:25]4)=[CH:13][CH:12]=2)=[O:9])=[N:6][CH:7]=1.C(=O)([O-])[O-].[K+].[K+]>CO>[NH2:29][C:26]1[O:27][CH2:28][C@:22]2([N:25]=1)[C:23]1[CH:24]=[C:11]([NH:10][C:8]([C:5]3[CH:4]=[CH:3][C:2]([Cl:1])=[CH:7][N:6]=3)=[O:9])[CH:12]=[CH:13][C:14]=1[O:15][C:16]1[C:21]2=[CH:20][C:19]([O:36][CH3:37])=[CH:18][CH:17]=1参加物
4
実験手順
A solution of (S)-5-chloro-N-(2′-methoxy-2-(2,2,2-trifluoroacetamido)-5H-spiro[oxazole-4,9′-xanthene]-7′-yl)picolinamide (0.054 g, 0.101 mmol) in methanol (3.5 mL) was treated with potassium carbonate anhydrous (0.045 g, 0.326 mmol) and stirred at RT for 30 minutes. The catalyst was removed by filtration and the filtrate was concentrated to yield the crude product as a yellowish gummy solid. The crude product was purified by preparative HPLC [gradient 10-90% MeCN (0.1% TFA)/H2O (0.1% TFA)] to give pure product which was dissolved in methanol (5 mL) and neutralized by passing the solution through a Polymer Lab-HCO3 macroporous resin cartridge, and the filtrate was concentrated to give N-((4S)-2-amino-7′-methoxyspiro[1,3-oxazole-4,9′-xanthen]-2′-yl)-5-chloro-2-pyridinecarboxamide as an off-white solid. MS (ESI pos. ion) m/z: 437 (M+1).