Acetic Acid → HCID 46831173, compound

HRID 1667721Notes

Reaction equation

HRID 1667721 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([C:8]2[N:9]=[C:10]([N:16]3[C:20]4[CH:21]=[C:22]([O:25][CH:26]5[CH2:31][CH2:30][NH:29][CH2:28][CH2:27]5)[CH:23]=[CH:24][C:19]=4[N:18]=[CH:17]3)[S:11][C:12]=2[C:13]([NH2:15])=[O:14])[CH:5]=[CH:6][CH:7]=1.C=O.[C:34](O)(=O)C.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>CO.ClCCl>[Cl:1][C:2]1[CH:3]=[C:4]([C:8]2[N:9]=[C:10]([N:16]3[C:20]4[CH:21]=[C:22]([O:25][CH:26]5[CH2:27][CH2:28][N:29]([CH3:34])[CH2:30][CH2:31]5)[CH:23]=[CH:24][C:19]=4[N:18]=[CH:17]3)[S:11][C:12]=2[C:13]([NH2:15])=[O:14])[CH:5]=[CH:6][CH:7]=1

Participants

6

Reactant 4

HCID 176Acetic AcidHCID 712FormaldehydeHCID 5049666Sodium triacetoxyborohydrideHCID 46831172HCID 46831172, compound

Product 1

HCID 46831173HCID 46831173, compoundYield 80.7%

Reagents, catalysts & solvents 1

HCID 21226129Dichloromethane methanolSolvent

Procedure

To a mixture of 0.041 g (0.09 mmole) 4-(3-chloro-phenyl)-2-[6-(piperidin-4-yloxy)-benzoimidazol-1-yl]-thiazole-5-carboxylic acid amide (I.21), 0.0135 mL of 37% aqueous formaldehyde solution, 0.0062 mL (0.11 mmole) of acetic acid and 2.1 mL of methanol-dichloromethane (2:5) was added 0.029 g (0.14 mmole) of sodium triacetoxy-borohydride. The mixture was stirred at room temperature for 18 hours. The solution was concentrated under reduced pressure. The residue was diluted with dichloromethane-ethyl acetate and washed with aqueous 1M sodium hydroxide solution and brine, dried over anhydrous magnesium sulfate, filtered and concentrated under reduced pressure. The residue was purified by silica gel chromatography, eluting with methanol-dichloromethane (gradient 10:90-20:80) to give 0.034 g of 4-(3-chloro-phenyl)-2-[6-(1-methyl-piperidin-4-yloxy)-benzoimidazol-1-yl]-thiazole-5-carboxylic acid amide (1.22). MH+/Z=468

Workup

  1. concentrationThe solution was concentrated under reduced pressure
  2. additionThe residue was diluted with dichloromethane-ethyl acetate
  3. washwashed with aqueous 1M sodium hydroxide solution and brine
  4. dry with materialdried over anhydrous magnesium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customThe residue was purified by silica gel chromatography
  8. washeluting with methanol-dichloromethane (gradient 10:90-20:80)

Sources & evidence

ORD record
ord-3d0a81811ab3415989e67b608f7f9812
Source dataset
uspto-grants-2011_10
Patent number
US08044213B2

Reaction notes

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