Formaldehyde → 2-[3,5-bis(trifluoromethyl)phenyl]-N-[4-(4-fluoro-2-methylphenyl)-6-(8-methyloctahydro-2H-pyrazino[1,2-a]pyrazin-2-yl)-3-pyridinyl]-N,2-dimethylpropanamide

HRID 2074932Notes

Reaction equation

HRID 2074932 reaction equation
[F:1][C:2]([F:45])([F:44])[C:3]1[CH:4]=[C:5]([C:13]([CH3:43])([CH3:42])[C:14]([N:16]([C:18]2[CH:19]=[N:20][C:21]([N:32]3[CH2:37][CH2:36][N:35]4[CH2:38][CH2:39][NH:40][CH2:41][CH:34]4[CH2:33]3)=[CH:22][C:23]=2[C:24]2[CH:29]=[CH:28][C:27]([F:30])=[CH:26][C:25]=2[CH3:31])[CH3:17])=[O:15])[CH:6]=[C:7]([C:9]([F:12])([F:11])[F:10])[CH:8]=1.C=O.[C:48](O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>C(#N)C>[F:12][C:9]([F:11])([F:10])[C:7]1[CH:6]=[C:5]([C:13]([CH3:43])([CH3:42])[C:14]([N:16]([C:18]2[CH:19]=[N:20][C:21]([N:32]3[CH2:37][CH2:36][N:35]4[CH2:38][CH2:39][N:40]([CH3:48])[CH2:41][CH:34]4[CH2:33]3)=[CH:22][C:23]=2[C:24]2[CH:29]=[CH:28][C:27]([F:30])=[CH:26][C:25]=2[CH3:31])[CH3:17])=[O:15])[CH:4]=[C:3]([C:2]([F:44])([F:1])[F:45])[CH:8]=1

Participants

5

Reactant 3

HCID 712FormaldehydeHCID 5049666Sodium triacetoxyborohydrideHCID 592157712-[3,5-bis(trifluoromethyl)phenyl]-N-[4-(4-fluoro-2-methyl phenyl)-6-(octahydro-2H-pyrazino[1,2-a]pyrazin-2-yl)-3-pyridinyl]-N,2-dimethylpropanamide

Product 1

HCID 160635362-[3,5-bis(trifluoromethyl)phenyl]-N-[4-(4-fluoro-2-methylphenyl)-6-(8-methyloctahydro-2H-pyrazino[1,2-a]pyrazin-2-yl)-3-pyridinyl]-N,2-dimethylpropanamideYield 55.6%

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

To a solution of crude 2-[3,5-bis(trifluoromethyl)phenyl]-N-[4-(4-fluoro-2-methylphenyl)-6-(octahydro-2H-pyrazino[1,2-a]pyrazin-2-yl)-3-pyridinyl]-N,2-dimethylpropanamide (D80, 100 mg, 0.16 mmol) in 5 mL of acetonitrile was added a 37% aqueous formaldehyde solution (24 μL, 0.32 mmol). The solution was stirred at room temperature for 30 min, and then sodium triacetoxyborohydride (50 mg, 0.24 mmol) was added and the reaction stirred at room temperature overnight. The solvent was evaporated and the residue dissolved in dichloromethane and extracted with water and brine. The product was purified by flash chromatography (silica, dichloromethane to dichloromethane: MeOH 95:5). Obtained 58 mg of the title compound.

Workup

  1. stirringthe reaction stirred at room temperature overnight
  2. customThe solvent was evaporated
  3. dissolutionthe residue dissolved in dichloromethane
  4. extractionextracted with water and brine
  5. customThe product was purified by flash chromatography (silica, dichloromethane to dichloromethane: MeOH 95:5)

Sources & evidence

ORD record
ord-d4341ae5968d40239d04fbf23a22dff9
Source dataset
uspto-grants-2011_04
Patent number
US07919491B2

Reaction notes

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