4-Toluenesulfonyl chloride → 1-(3,5-Di-O-benzyl-4-C-(p-toluenesulphonyloxymethyl)-2-O-p-toluenesulphonyi-beta-D-ribofuranosyl)thymine

HRID 1663547Notes

Reaction equation

HRID 1663547 reaction equation
[CH2:1]([O:8][C@@H:9]1[C@@:13]([CH2:23][OH:24])([CH2:14][O:15][CH2:16][C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)[O:12][C@@H:11]([N:25]2[CH:33]=[C:31]([CH3:32])[C:29](=[O:30])[NH:28][C:26]2=[O:27])[C@@H:10]1[OH:34])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[C:35]1([CH3:45])[CH:40]=[CH:39][C:38]([S:41](Cl)(=[O:43])=[O:42])=[CH:37][CH:36]=1>CN(C1C=CN=CC=1)C.ClCCl>[CH2:1]([O:8][C@@H:9]1[C@@:13]([CH2:23][O:24][S:41]([C:38]2[CH:39]=[CH:40][C:35]([CH3:45])=[CH:36][CH:37]=2)(=[O:43])=[O:42])([CH2:14][O:15][CH2:16][C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)[O:12][C@@H:11]([N:25]2[CH:33]=[C:31]([CH3:32])[C:29](=[O:30])[NH:28][C:26]2=[O:27])[C@@H:10]1[O:34][S:41]([C:38]1[CH:39]=[CH:40][C:35]([CH3:45])=[CH:36][CH:37]=1)(=[O:43])=[O:42])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

5

Reactant 2

HCID 73974-Toluenesulfonyl chlorideHCID 110379851-((2R,3R,4S,5R)-4-(benzyloxy)-5-((benzyloxy)methyl)-3-hydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl)-5-methylpyrimidine-2,4(1H,3H)-dione

Product 1

HCID 106052381-(3,5-Di-O-benzyl-4-C-(p-toluenesulphonyloxymethyl)-2-O-p-toluenesulphonyi-beta-D-ribofuranosyl)thymineYield 80%

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6344DichloromethaneSolvent2×

Procedure

A solution of 1-(3,5-di-O-benzyl-4-C-(hydroxymethyl)-β-D-ribofuranosyl)thymine 35 (1.48 g, 3.16 mmol), DMAP (1.344 g, 0.011 mol) and p-toluenesulphonyl chloride (1.45 g, 7.6 mmol) in dichloromethane (20 ml) was stirred for 3 h at room temperature. The reaction mixture was diluted with dichloromethane (30 ml) and washed with saturated aqueous solutions of sodium hydrogen carbonate (3×20 ml) and sodium chloride (2×25 ml). The organic phase was dried (Na2SO4), filtered and evaporated under reduced pressure. The residue was subjected to silica gel column chromatography using methanol:dichloromethane (1:99, v/v) as eluent to give nucleoside 72 (1.95 g, 80%) as a white solid material. FAB-MS m/e 776. δC (CDCl3) 162.9, 149.8 (C-2, C-4), 145.8, 145.2 (2×Ts), 136.9, 136.8 (2×Bn), 134.3 (C-6), 132.1, 132.0, 130.0, 129.9, 129.0 128.9, 128.4, 128.3, 128.2, 128.0, 127.7 (2×Ts, 2×Bn), 111.2 (C-5), 85.3, 84.0 (C-1′, C-4′), 78.9, 78.3, 75.2, 74.3, 72.7, 69.1 (C-2′, C-3′, C-5′, C-1″, 2×Bn), 21.7 (2×CH3), 11.9 (CH3). Anal. Calcd. for C39H40N2S2O11: C, 60.30; H, 5.19; N, 3.61. Found: C, 59.95; H, 5.11, N 3.81.

Workup

  1. washwashed with saturated aqueous solutions of sodium hydrogen carbonate (3×20 ml) and sodium chloride (2×25 ml)
  2. dry with materialThe organic phase was dried (Na2SO4)
  3. filtrationfiltered
  4. customevaporated under reduced pressure

Sources & evidence

ORD record
ord-6f43fc4ccc234e4482766b554820eeac
Source dataset
uspto-grants-2011_10
Patent number
US08034909B2

Reaction notes

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