Sodium borohydride → HCID 57742987, compound

HRID 1926832Notes

Reaction equation

HRID 1926832 reaction equation
[Br:1][C:2]1[C:3]([C:20](OC)=[O:21])=[C:4]2[N:10]=[CH:9][N:8]([CH2:11][C:12]3[CH:17]=[CH:16][C:15]([O:18][CH3:19])=[CH:14][CH:13]=3)[C:5]2=[N:6][CH:7]=1.[BH4-].[Na+]>C(O)C>[Br:1][C:2]1[C:3]([CH2:20][OH:21])=[C:4]2[N:10]=[CH:9][N:8]([CH2:11][C:12]3[CH:13]=[CH:14][C:15]([O:18][CH3:19])=[CH:16][CH:17]=3)[C:5]2=[N:6][CH:7]=1

Participants

4

Reactant 2

HCID 4311764Sodium borohydrideHCID 57743086HCID 57743086, compound

Product 1

HCID 57742987HCID 57742987, compoundYield 65%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

Methyl 6-bromo-3-(4-methoxybenzyl)-3H-imidazo[4,5-b]pyridine-7-carboxylate x210 (1.2 g, 3.19 mmol) is dissolved in absolute ethanol. NaBH4 (0.36 g, 3 eq, 9.57 mmol) is added at 5° C. under stirring. The cooling bath is removed after 4 h, and the reaction mixture is allowed to heat up to room temperature. The stirring is continued at this temperature for 20 h. The reaction mixture is evaporated in the vacuum of a rotary evaporator at 35° C., and the residue is partitioned in ethyl acetate/saturated aqueous NaHCO3 mixture. The organic layer is dried with anhydrous sodium sulfate and evaporated. The crude product is purified by chromatography on silicagel (dichloromethane/methanol) to afford 0.72 g of [6-bromo-3-(4-methoxybenzyl)-3H-imidazo[4,5-b]pyridin-7-yl]methanol x211.

Workup

  1. customThe cooling bath is removed after 4 h
  2. customThe reaction mixture is evaporated in the vacuum of a rotary evaporator at 35° C.
  3. customthe residue is partitioned in ethyl acetate/saturated aqueous NaHCO3 mixture
  4. dry with materialThe organic layer is dried with anhydrous sodium sulfate
  5. customevaporated
  6. customThe crude product is purified by chromatography on silicagel (dichloromethane/methanol)

Sources & evidence

ORD record
ord-d796b20028d543bebd87348a9e0a44fd
Source dataset
uspto-grants-2012_05
Patent number
US08183241B2

Reaction notes

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