Sodium Bicarbonate → 2,5,6-Trichloro-3-(N-hydroxyiminomethylidene)-1-(beta-D-ribofuranosyl)indole

HRID 28350

反応式

HRID 28350 の反応式
[Cl:1][C:2]1[N:3]([C@@H:15]2[O:21][C@H:20]([CH2:22][OH:23])[C@@H:18]([OH:19])[C@H:16]2[OH:17])[C:4]2[C:9]([C:10]=1[CH:11]=O)=[CH:8][C:7]([Cl:13])=[C:6]([Cl:14])[CH:5]=2.Cl.[O:25]([NH2:27])C.C(=O)(O)[O-].[Na+].CO.O>CO.O.S([O-])([O-])(=O)=S.[Na+].[Na+]>[Cl:1][CH:2]1[C:10](=[C:11]=[N:27][OH:25])[C:9]2[C:4](=[CH:5][C:6]([Cl:14])=[C:7]([Cl:13])[CH:8]=2)[N:3]1[C@@H:15]1[O:21][C@H:20]([CH2:22][OH:23])[C@@H:18]([OH:19])[C@H:16]1[OH:17]

参加物

8

反応物 4

HCID 516892Sodium BicarbonateHCID 521874O-Methylhydroxylamine hydrochlorideHCID 3011610FtcriHCID 22242641Methanol--water (1/1)

生成物 1

HCID 865989682,5,6-Trichloro-3-(N-hydroxyiminomethylidene)-1-(beta-D-ribofuranosyl)indole収率 70%

試薬・触媒・溶媒 3

HCID 887Methanol溶媒HCID 962Water溶媒HCID 24477Sodium Thiosulfate溶媒

実験手順

To a solution of 2,5,6-trichloro-3-formyl-1-(β-D-ribofuranosyl)indole (4.3, 170 mg, 0.45 mmol) in MeOH (10 mL) was added a solution of methoxylamine hydrochloride (39 mg, 0.56 mmol) and sodium bicarbonate (49 mg, 0.48 mmol) in water (2.0 mL). The resulting mixture was stirred at room temperature for 16 h, then the solvent was evaporated to provide a pale yellow residue. The residue was suspended in 20 mL of 5% aqueous sodium thiosulfate and extracted with EtOAc (2×50 mL). The combined organic extracts were washed with brine (25 mL), dried over MgSO4, filtered and evaporated to yield a pink residue. The residue was subjected to column chromatography (40×350 mm) on C18 reverse-phase silica gel with 75% MeOH/H2O. The appropriate UV-active fractions were pooled and evaporated to yield 124 mg (70%) of 4.29 as a white powder. A portion was recrystallized from Et2O/hexane to yield a white crystalline solid: mp 208-209 C; Rf 0.2 (10% MeOH/CHCl3); 1H NMR (500 MHz, DMSO-d6) δ 11.31 (s, 1H), 8.54 (s, 1H), 8.22 (s, 1H), 8.19 (s, 1H), 5.93 (d, 1H), 5.37 (m, 2H, D2O exch.), 5.25 (m, 1H, D2O exch.), 4.43 (m, 1H), 4.16 (m, 1H), 3.99 (m, 1H), 3.73 (m, 2H). 13C NMR (125 MHz, DMSO-d6) δ 141.30, 133.03, 128.48, 125.85, 124.73, 124.05, 121.76, 115.31, 106.70, 88.81, 86.02, 71.39, 69.65, 61.11. HRMS (EI) m/z calcd. for C14H13Cl3N2O5 393.9890, found 393.9892. Anal calcd for C14H13Cl3N2O5·½Et2O: C, 44.41; H, 4.19; N, 6.47. Found: C, 44.16; H, 4.18; N, 6.48.

後処理

  1. customthe solvent was evaporated
  2. customto provide a pale yellow residue
  3. extractionextracted with EtOAc (2×50 mL)
  4. washThe combined organic extracts were washed with brine (25 mL)
  5. dry with materialdried over MgSO4
  6. filtrationfiltered
  7. customevaporated
  8. customto yield a pink residue
  9. customevaporated

出典と根拠

ORDレコード
ord-770da38fa8834008a9fa6f1e782aad9f
出典データセット
uspto-grants-2008_09
特許番号
US07419963B2

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