Sulfuric Acid → HCID 25262927, compound

HRID 40817Notes

Reaction equation

[NH2:1][C:2]1[N:7]=[C:6]([NH2:8])[C:5]([O:9][CH2:10][CH2:11][CH2:12][O:13][C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][C:15]=2[O:20][CH2:21][CH2:22][CH2:23][C:24]([OH:26])=[O:25])=[C:4]([CH2:27][CH3:28])[N:3]=1.OS(O)(=O)=O.C(OCC)(OCC)O[CH2:36][CH3:37].C([O-])([O-])=O.[K+].[K+]>CCO>[NH2:1][C:2]1[N:7]=[C:6]([NH2:8])[C:5]([O:9][CH2:10][CH2:11][CH2:12][O:13][C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][C:15]=2[O:20][CH2:21][CH2:22][CH2:23][C:24]([O:26][CH2:36][CH3:37])=[O:25])=[C:4]([CH2:27][CH3:28])[N:3]=1

Participants

Conditions

Temperature: 25 °C

Procedure

To a solution of 2,4-diamino-6-ethyl-5-(3-(2-(3-carboxypropoxy)phenoxy)propoxy)pyrimidine (0.3904 g, 1 mmol) and a catalytic amount of con. H2SO4 in EtOH (4 mL) was added triethyl orthoformate (2 mL) and the solution was left stirring at 25° C. for 8 hours. The reaction mixture was neutralized with K2CO3 and evaporated to dryness. The crude product was diluted with water and extracted with CH2Cl2. Evaporation to dryness gave the desired ester as white semi-solid (0.2720 g, 65%). 1H NMR (500 MHz, DMSO-d6): 0.99 (3H, t, J=7.5 Hz), 1.15 (3H, t, J=7.1 Hz), 1.93 (2H, m), 2.13 (2H, m), 2.33 (2H, q, J=7.5 Hz), 2.45 (2H, t, J=7.3 Hz), 3.78 (2H, t, J=6.0 Hz), 3.95 (2H, t, J=6.3 Hz), 4.03 (2H, q, J=7.1 Hz), 4.13 (2H, t, J=6.0 Hz), 5.54 (2H, s), 6.07 (2H, s), 6.87-6.90 (2H, m), 6.95-7.01 (2H, m).

Workup

waitthe solution was left
customevaporated to dryness
additionThe crude product was diluted with water
extractionextracted with CH2Cl2
customEvaporation to dryness

Sources & evidence

ORD record: ord-22a555e0567f47e592e2646cdc7aa16a
Source dataset: uspto-grants-2013_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08530491B2

Reaction notes

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