Methanol → (2-{4-[(2,4-Diamino-pteridin-6-ylmethyl)-methyl-amino]-benzoylamino}-propyl)-phosphonic acid

HRID 272224Notes

Reaction equation

C([O:3][P:4]([CH2:9][CH:10]([NH:12][C:13](=[O:35])[C:14]1[CH:19]=[CH:18][C:17]([N:20]([CH2:22][C:23]2[N:24]=[C:25]3[C:30](=[N:31][CH:32]=2)[N:29]=[C:28]([NH2:33])[N:27]=[C:26]3[NH2:34])[CH3:21])=[CH:16][CH:15]=1)[CH3:11])(=[O:8])[O:5]CC)C.C[Si](Br)(C)C.O.CO>CN(C=O)C>[NH2:33][C:28]1[N:27]=[C:26]([NH2:34])[C:25]2[C:30](=[N:31][CH:32]=[C:23]([CH2:22][N:20]([CH3:21])[C:17]3[CH:16]=[CH:15][C:14]([C:13]([NH:12][CH:10]([CH3:11])[CH2:9][P:4](=[O:3])([OH:8])[OH:5])=[O:35])=[CH:19][CH:18]=3)[N:24]=2)[N:29]=1

Participants

Conditions

Temperature: 70 °C

Procedure

To a solution of crude (2-{4-[(2,4-diamino-pteridin-6-ylmethyl)-methyl-amino]-benzoylamino}-propyl)-phosphonic acid diethyl ester post silica column chromatography (32.2 mg, 66.2 μmol) in dry DMF (0.50 mL) was added TMSBr (68.0 μL, 529.6 μmol) at ambient temperature. The solution was then heated at 70° C. for 1.0 hour, when LCMS analysis demonstrated the reaction to be complete. The reaction mixture was allowed to cool to room temperature, and water (60 μL) and methanol (60 μL) were added. The crude reaction mixture was purified by RP HPLC on C18 column using H2O/acetonitrile (2-95%) to provide 11.2 mg (38%) of the desired compound as a yellow solid. 1H NMR (300 MHz, DMSO-d6) δ 1.50 (m, 2H), 1.61 (m, 2H), 3.22 (s, 3H), 3.25-3.40 (m, 2H), 4.84 (s, 2H), 6.80 (d, 2H, J=9 Hz), 7.69 (d, 2H, J=9 Hz), 8.20 (br s, 1H), 8.69 (s, 1H). 31P (121.4 MHz, DMSO-d6) δ 26.3. MS (m/z) 447.3 [M−H]−.

Workup

customthe reaction
temperatureto cool to room temperature
customThe crude reaction mixture
customwas purified by RP HPLC on C18 column

Sources & evidence

ORD record: ord-8a8ef114f7694e1cb1970c74a53babf1
Source dataset: uspto-grants-2008_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07452901B2

Reaction notes

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