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Sodium borohydride → 6-Methyl-N4-(2-methylpropyl)-N2, N2-bis(phenylmethyl)pyridine-2,3,4-triamine

HRID 263719
Notes
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Reaction equation

HRID 263719 reaction equation
[BH4-].[Na+].[CH3:3][C:4]1[N:9]=[C:8]([N:10]([CH2:18][C:19]2[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=2)[CH2:11][C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)[C:7]([N+:25]([O-])=O)=[C:6]([NH:28][CH2:29][CH:30]([CH3:32])[CH3:31])[CH:5]=1>CO.C(Cl)Cl.O.[Ni](Cl)Cl>[CH3:3][C:4]1[N:9]=[C:8]([N:10]([CH2:18][C:19]2[CH:20]=[CH:21][CH:22]=[CH:23][CH:24]=2)[CH2:11][C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)[C:7]([NH2:25])=[C:6]([NH:28][CH2:29][CH:30]([CH3:32])[CH3:31])[CH:5]=1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 2

HCID 4311764Sodium borohydride2×HCID 540930236-methyl-N4-(2-methylpropyl)-3-nitro-N2, N2-bis(phenylmethyl)pyridine-2,4-diamine

Product 1

HCID 538812726-Methyl-N4-(2-methylpropyl)-N2, N2-bis(phenylmethyl)pyridine-2,3,4-triamineYield 85.1%

Reagents, catalysts & solvents 3

HCID 16212333Nickel chloride hydrateCatalyst
HCID 887
Methanol
Solvent
HCID 6344DichloromethaneSolvent

Procedure

Sodium borohydride (585 mg, 16 mmole) was added to a solution of nickel (II) chloride hydrate (1.02 g, 4.3 mmole) in methanol (100 mL). The addition caused a black solid to form along with gas evolution. The resulting heterogeneous mixture was stirred at ambient temperature for 30 minutes. A solution containing 6-methyl-N4 -(2-methylpropyl)-3-nitro-N2, N2 -bis(phenylmethyl)pyridine-2,4-diamine (3.47 g, 8.6 mmole) in methylene chloride (20 mL) was added followed by the addition of sodium borohydride (1.37 g, 36 mmole). The reaction mixture was stirred at ambient temperature for about 30 minutes then eluted through a layer of silica gel with a methanol/methylene chloride mixture. The filtrate was concentrated under vacuum. The resulting residue was partitioned between ethyl acetate and water. The ethyl acetate layer was separated, dried with magnesium sulfate and concentrated under vacuum to provide 2.74 g of the desired product as a green foam.

Workup

  1. additionThe addition
  2. customto form along with gas evolution
  3. additionwas added
  4. stirringThe reaction mixture was stirred at ambient temperature for about 30 minutes
  5. washthen eluted through a layer of silica gel with a methanol/methylene chloride mixture
  6. concentrationThe filtrate was concentrated under vacuum
  7. customThe resulting residue was partitioned between ethyl acetate and water
  8. customThe ethyl acetate layer was separated
  9. dry with materialdried with magnesium sulfate
  10. concentrationconcentrated under vacuum

Sources & evidence

ORD record
ord-42a2b14812b04f67bb95c1b179e2b081
Source dataset
uspto-grants-1997_07
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US05644063

Reaction notes

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