2,5,6-trichloro-1-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl]indole-3-carbonitrile → 5,6-dichloro-1-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl]-2-methoxy-indole-3-carbonitrile

HRID 28349Notes

Reaction equation

HRID 28349 reaction equation
Cl[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[C:11]#[N:12])=[CH:8][C:7]([Cl:13])=[C:6]([Cl:14])[CH:5]=2.[CH3:24][O-:25].[Na+]>CO>[Cl:13][C:7]1[CH:8]=[C:9]2[C:4](=[CH:5][C:6]=1[Cl:14])[N:3]([C@@H:15]1[O:21][C@H:20]([CH2:22][OH:23])[C@@H:18]([OH:19])[C@H:16]1[OH:17])[C:2]([O:25][CH3:24])=[C:10]2[C:11]#[N:12]

Participants

4

Reactant 2

HCID 30125652,5,6-trichloro-1-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl]indole-3-carbonitrileHCID 10942334Sodium Methoxide

Product 1

HCID 116751585,6-dichloro-1-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)tetrahydrofuran-2-yl]-2-methoxy-indole-3-carbonitrileYield 67.5%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

2,5,6-Trichloro-3-cyano-1-(β-D-ribofuranosyl)indole (4.4, 100 mg, 0.27 mmol) was dissolved in dry MeOH (10 mL) to which was added sodium methoxide (100 mg, 1.9 mmol). The resulting solution heated at reflux for 2 h, then cooled to room temperature and the solvent evaporated. The residual solid was recrystallized from MeOH/H2O to yield 68 mg (63%) of 4.26 as a white powder: mp 245-246° C.; Rf 0.2 (10% MeOH/CHCl3); 1H-NMR (500 MHz, DMSO-d6): δ 8.36 (s, 1H), 7.65 (s, 1H), 5.80 (d, 1H), 5.37 (d, 1H, D2O exch.), 5.28 (t, 1H, D2O exch.), 5.20 (d, 1H, D2O exch.), 4.39-4.37 (m, 4H), 4.10 (m, 1H), 3.93 (d, 1H), 3.66 (m, 2H). 13C-NMR (125 MHz, DMSO-d6): δ 158.44, 128.52, 126.05, 125.01, 124.81, 118.21, 115.02, 114.47, 86.89, 85.86, 71.06, 69.67, 65.16, 61.10, 60.81. HRMS (EI) m/z calcd. for C15H14Cl2N2O5 372.0280, found 372.0265. Anal calcd for C15H14Cl2N2O5: C, 48.28; H, 3.78; N, 7.51. Found: C, 47.97; H, 3.75; N, 7.34.

Workup

  1. temperatureThe resulting solution heated
  2. temperatureat reflux for 2 h
  3. customthe solvent evaporated
  4. customThe residual solid was recrystallized from MeOH/H2O

Sources & evidence

ORD record
ord-fc35fea11d094127ab45c341f04e17e6
Source dataset
uspto-grants-2008_09
Patent number
US07419963B2

Reaction notes

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