5-(2-Isopropyl-4-methoxy-5-nitro-phenoxy)-pyrimidine-2,4-diamine → 5-(5-Amino-2-isopropyl-4-methoxy-phenoxy)-pyrimidine-2,4-diamine

HRID 38360Notes

Reaction equation

HRID 38360 reaction equation
[CH:1]([C:4]1[CH:18]=[C:17]([O:19][CH3:20])[C:16]([N+:21]([O-])=O)=[CH:15][C:5]=1[O:6][C:7]1[C:8]([NH2:14])=[N:9][C:10]([NH2:13])=[N:11][CH:12]=1)([CH3:3])[CH3:2]>C(O)C.[Pd]>[NH2:21][C:16]1[C:17]([O:19][CH3:20])=[CH:18][C:4]([CH:1]([CH3:3])[CH3:2])=[C:5]([CH:15]=1)[O:6][C:7]1[C:8]([NH2:14])=[N:9][C:10]([NH2:13])=[N:11][CH:12]=1

Participants

4

Reactant 1

HCID 595985755-(2-Isopropyl-4-methoxy-5-nitro-phenoxy)-pyrimidine-2,4-diamine

Product 1

HCID 595985735-(5-Amino-2-isopropyl-4-methoxy-phenoxy)-pyrimidine-2,4-diamine

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 702EthanolSolvent

Procedure

To 5-(2-isopropyl-4-methoxy-5-nitro-phenoxy)-pyrimidine-2,4-diamine (2.1 g, 6.58 mmol) suspended in ethanol (150 mL) in a Parr bomb, was added 10% palladium on charcoal (210 mg). After hydrogenation in the Parr hydrogenator overnight at 35 psi, the reaction was filtered through celite. The celite pad was washed with ethanol and ethyl acetate and the filtrate was concentrated. Purification with silica gel column chromatography (92/8/0.1 dichloromethane/methanol/ammonium hydroxide) gave 5-(5-amino-2-isopropyl-4-methoxy-phenoxy)-pyrimidine-2,4-diamine as a pale orange solid (468 mg, 25%, (M+H)+=290), which was converted to the hydrochloride salt.

Workup

  1. filtrationAfter hydrogenation in the Parr hydrogenator overnight at 35 psi, the reaction was filtered through celite
  2. washThe celite pad was washed with ethanol and ethyl acetate
  3. concentrationthe filtrate was concentrated
  4. customPurification with silica gel column chromatography (92/8/0.1 dichloromethane/methanol/ammonium hydroxide)

Sources & evidence

ORD record
ord-897d6418715b438eba67157cb720c337
Source dataset
uspto-grants-2013_09
Patent number
US08524725B2

Reaction notes

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