Sodium borohydride → {3-[8-(1-Ethyl-propyl)-2,6-dimethyl-imidazo[1,2-b]pyridazin-3-yl]-2-methyl-imidazo[1,2-a]pyridin-8-yl}-methanol

HRID 226047Notes

Reaction equation

HRID 226047 reaction equation
[CH2:1]([CH:3]([C:6]1[C:7]2[N:8]([C:13]([C:17]3[N:21]4[CH:22]=[CH:23][CH:24]=[C:25]([CH:26]=[O:27])[C:20]4=[N:19][C:18]=3[CH3:28])=[C:14]([CH3:16])[N:15]=2)[N:9]=[C:10]([CH3:12])[CH:11]=1)[CH2:4][CH3:5])[CH3:2].[BH4-].[Na+]>CO>[CH2:1]([CH:3]([C:6]1[C:7]2[N:8]([C:13]([C:17]3[N:21]4[CH:22]=[CH:23][CH:24]=[C:25]([CH2:26][OH:27])[C:20]4=[N:19][C:18]=3[CH3:28])=[C:14]([CH3:16])[N:15]=2)[N:9]=[C:10]([CH3:12])[CH:11]=1)[CH2:4][CH3:5])[CH3:2]

Participants

4

Reactant 2

HCID 4311764Sodium borohydrideHCID 577525973-[8-(1-Ethyl-propyl)-2,6-dimethyl-imidazo[1,2-b]pyridazin-3-yl]-2-methyl-imidazo[1,2-a]pyridine-8-carboxaldehyde

Product 1

HCID 57752721{3-[8-(1-Ethyl-propyl)-2,6-dimethyl-imidazo[1,2-b]pyridazin-3-yl]-2-methyl-imidazo[1,2-a]pyridin-8-yl}-methanolYield 87.6%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Procedure

A solution of 3-[8-(1-ethyl-propyl)-2,6-dimethyl-imidazo[1,2-b]pyridazin-3-yl]-2-methyl-imidazo[1,2-a]pyridine-8-carboxaldehyde (0.33 g, 0.89 mmol) in CH3OH 910 ml) is treated with NaBH4 (37 mg, 0.98 mmol), and stirred at RT for 30 min. It is quenched with sat. NH4Cl (5 mL), the organic solvent is removed in vacuo, and the residue is diluted with H2O (10 mL) ppm. The aqueous layer is extracted with EtOAC (2×30 mL); the combined organic layers is dried with Na2SO4; filtered and concentrated to give the title compound (0.29 g, 0.78 mmol, 87%). 1H NMR (CDCl3): δ. 0.90 (t, J=7.0 Hz, 3H), 0.91 (t, J=7.0 Hz, 3H), 1.78-1.98 (m, 4H), 2.42 (s, 3H), 2.43 (s, 3H), 2.45 (s, 3H), 3.36-3.42 (m, 1H), 4.39 (bs, 1H), 5.11 (s, 2H), 6.73 (d, J=5.7 Hz, 1H), 6.73 (s, 1H), 7.17 (d, J=6.6 Hz, 1H), 7.46 (d, J=6.6 Hz, 1H) ppm. ES-MS (m/z): calcd for C22H27N5O (M+H)+: 378.5. found: 378.3.

Workup

  1. customIt is quenched with sat. NH4Cl (5 mL)
  2. customthe organic solvent is removed in vacuo
  3. additionthe residue is diluted with H2O (10 mL) ppm
  4. extractionThe aqueous layer is extracted with EtOAC (2×30 mL)
  5. dry with materialthe combined organic layers is dried with Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated

Sources & evidence

ORD record
ord-4a009d3049004b9e9e5e29e8cf3c286f
Source dataset
uspto-grants-2009_07
Patent number
US07557103B2

Reaction notes

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