Hoffer's chlorosugar → 2-Chloro-9-[2-deoxy-3,5-di-o-(p-toluoyl)-beta-d-erythro-pentofuranosyl]-6-(2-propylimidazol-1-yl)purine

HRID 2264881ノート

反応式

HRID 2264881 の反応式
[Na].[Cl:2][C:3]1[N:11]=[C:10]2[C:6]([NH:7][CH:8]=[N:9]2)=[C:5]([N:12]2[CH:16]=[CH:15][N:14]=[C:13]2[CH2:17][CH2:18][CH3:19])[N:4]=1.[C:20]1([CH3:46])[CH:25]=[CH:24][C:23]([C:26]([O:28][C@@H:29]2[C@@H:33]([CH2:34][O:35][C:36]([C:38]3[CH:43]=[CH:42][C:41]([CH3:44])=[CH:40][CH:39]=3)=[O:37])[O:32][C@H:31](Cl)[CH2:30]2)=[O:27])=[CH:22][CH:21]=1>CC#N.C(Cl)Cl>[Cl:2][C:3]1[N:11]=[C:10]2[C:6]([N:7]=[CH:8][N:9]2[C@@H:31]2[O:32][C@H:33]([CH2:34][O:35][C:36]([C:38]3[CH:39]=[CH:40][C:41]([CH3:44])=[CH:42][CH:43]=3)=[O:37])[C@@H:29]([O:28][C:26]([C:23]3[CH:22]=[CH:21][C:20]([CH3:46])=[CH:25][CH:24]=3)=[O:27])[CH2:30]2)=[C:5]([N:12]2[CH:16]=[CH:15][N:14]=[C:13]2[CH2:17][CH2:18][CH3:19])[N:4]=1

参加物

6

反応物 3

HCID 98571Hoffer's chlorosugarHCID 5360545SodiumHCID 115579952-Chloro-6-(2-propylimidazol-1-yl)purine

生成物 1

HCID 160880882-Chloro-9-[2-deoxy-3,5-di-o-(p-toluoyl)-beta-d-erythro-pentofuranosyl]-6-(2-propylimidazol-1-yl)purine収率 95%

試薬・触媒・溶媒 2

HCID 6342Acetonitrile溶媒HCID 6344Dichloromethane溶媒

実験手順

This reaction was repeated on a larger scale with the sodium salt of 2-chloro-6-(2-propylimidazol-1-yl)purine (1.54 g, 5.87 mmol) in dried CH3CN (100 mL) treated with 2-deoxy-3,5-di-O-(p-toluoyl)-α-D-erythro-pentofuranosyl chloride (3.74 g, 9.62 mmol) in CH2Cl2 (100 mL) by general method 2 for 5 h (reaction complete, TLC). Sampling at different reaction times showed no α-nucleoside by 1H NMR (500 MHz). Volatiles were evaporated, and the residue was dissolved in CH2Cl2. The solution was washed (H2O) and dried (Na2SO4), and volatiles were evaporated in vacuo. The residue was chromatographed (EtOAc/hexanes, 1:1→7:3) to give 2-chloro-9-[2-deoxy-3,5-di-O-(p-toluoyl)-β-D-erythro-pentofuranosyl]-6-(2-propylimidazol-1-yl)purine (3.42 g, 95%). Recrystallization from EtOAc gave the β-anomer (2.75 g, 76%).

後処理

  1. custom(reaction complete, TLC)
  2. aliquotSampling at different reaction times
  3. customVolatiles were evaporated
  4. dissolutionthe residue was dissolved in CH2Cl2
  5. washThe solution was washed (H2O)
  6. dry with materialdried (Na2SO4), and volatiles
  7. customwere evaporated in vacuo
  8. customThe residue was chromatographed (EtOAc/hexanes, 1:1→7:3)

出典と根拠

ORDレコード
ord-f4847b84b2df4efeaaf10ba134b44290
出典データセット
uspto-grants-2010_12
特許番号
US07855285B2

反応ノート

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