Potassium Hydroxide → HCID 178461171、化合物
反応式
[OH-].[K+].[CH3:3][C@@H:4]1[CH2:8][CH2:7][C:6](=O)[CH:5]1[C:10]([O:12]CC)=O.[NH2:15][C:16]([NH2:18])=[S:17]>O.C(O)C>[SH:17][C:16]1[N:15]=[C:10]([OH:12])[C:5]2[C@H:4]([CH3:3])[CH2:8][CH2:7][C:6]=2[N:18]=1[OH-].[K+].[CH3:3][C@@H:4]1[CH2:8][CH2:7][C:6](=O)[CH:5]1[C:10]([O:12]CC)=O.[NH2:15][C:16]([NH2:18])=[S:17]>O.C(O)C>[SH:17][C:16]1[N:15]=[C:10]([OH:12])[C:5]2[C@H:4]([CH3:3])[CH2:8][CH2:7][C:6]=2[N:18]=1KOH (8.3 g, 147.9 mmol) in water (60 mL) was added to a solution of a mixture of (2R)-ethyl 2-methyl-5-oxocyclopentanecarboxylate (20 g, 117.5 mmol) and thiourea (9.2 g, 120.9 mmol) in ethanol (100 mL). The mixture was refluxed for 10 hours. After cooling, the solvent was removed, and the residue was neutralized with concentrated HCl (12 mL) at 0° C. The mixture was then extracted with DCM (3×150 mL). The solvent was removed, and the residue was purified by silica gel chromatography, eluting with hexane/ethyl acetate (2:1) to give (R)-2-mercapto-5-methyl-6,7-dihydro-5H-cyclopenta[d]pyrimidin-4-ol (12 g, 56%). MS (APCI+) [M+H]+ 183.
読み込み中…
