Acetic Acid → 5-(5-Amino-2-isopropyl-4-methoxy-phenoxy)-pyrimidine-2,4-diamine

HRID 81783Notes

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].CC(O)=O>CCO.[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

Conditions

Temperature: 0 °C

Procedure

To a solution of 5-(2-isopropyl-4-methoxy-5-nitro-phenoxy)-pyrimidine-2,4-diamine (2.953 g, 9.2 mmol) in 250 mL EtOH and 25 AcOH was added 10% Pd/C. The mixture was placed under 50 psi of H2 via a Parr hydrogenator. After 2.5 h the mixture was filtered through a pad of celite. The pad was washed with ethyl acetate and the solution was partially concentrated in vacuo. The residue was taken up in 500 mL H2O and cooled to 0° C. The solution was adjusted to pH=12 with 50% NaOH extracted with ethyl acetate. The combined organics were washed with H2O, washed with brine, dried over Na2SO4, filtered and concentrated in vacuo to afford 5-(5-amino-2-Isopropyl-4-methoxy-phenoxy)-pyrimidine-2,4-diamine (2.156 g, 82%) as a dark-orange solid.

Workup

filtrationAfter 2.5 h the mixture was filtered through a pad of celite
washThe pad was washed with ethyl acetate
concentrationthe solution was partially concentrated in vacuo
extractionextracted with ethyl acetate
washThe combined organics were washed with H2O
washwashed with brine
dry with materialdried over Na2SO4
filtrationfiltered
concentrationconcentrated in vacuo

Sources & evidence

ORD record: ord-880b170e88814529a86267f988c5aff7
Source dataset: uspto-grants-2014_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08846705B2

Reaction notes

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