Lithium hydroxide, monohydrate → 2,4-Diamino-6-ethyl-5-(3-(2-(3-carboxypropoxy)phenoxy)propoxy)pyrimidine

HRID 40815Notes

Reaction equation

[NH2:1][C:2]1[N:7]=[C:6]([NH2:8])[C:5]([OH:9])=[C:4]([CH2:10][CH3:11])[N:3]=1.O.[OH-].[Li+].Br[CH2:16][CH2:17][CH2:18][O:19][C:20]1[CH:34]=[CH:33][CH:32]=[CH:31][C:21]=1[O:22][CH2:23][CH2:24][CH2:25][C:26]([O:28]CC)=[O:27]>CN(C=O)C.O>[NH2:1][C:2]1[N:7]=[C:6]([NH2:8])[C:5]([O:9][CH2:16][CH2:17][CH2:18][O:19][C:20]2[CH:34]=[CH:33][CH:32]=[CH:31][C:21]=2[O:22][CH2:23][CH2:24][CH2:25][C:26]([OH:28])=[O:27])=[C:4]([CH2:10][CH3:11])[N:3]=1

Participants

Conditions

Temperature: 25 °C

Procedure

2,4-Diamino-6-ethyl-5-hydroxypyrimidine (0.4625 g, 3 mmol) was added to a stirred solution of lithium hydroxide monohydrate (0.4406 g, 10.5 mmol) in DMF (4 mL) and the reaction mixture was stirred at 25° C. for 1 hour. A solution of ethyl 4-(2-(3-bromopropoxy)phenoxy)butanoate (1.0357 g, 3 mmol) in DMF (1 mL) was added and the reaction mixture was left stirring at 25° C. overnight. DMF was partially removed under reduced pressure to give residue. The residue was diluted with water and extracted with dichloromethane. The aqueous layer was neutralized with dilute HCl to give white solid. Recrystallization with acetone afforded the desired diaminopyrimidine as white solid (0.6911 g, 59%, m.p. 204-206° C.). 1H NMR (400 MHz, DMSO-d6): 1.10 (3H, t, J=7.5 Hz), 1.91 (2H, m), 2.14 (2H, m), 2.31-2.39 (4H, m), 3.78 (2H, t, J=6.1 Hz), 3.96 (2H, t, J=6.4 Hz), 4.13 (2H, t, J=6.1 Hz), 5.60 (2H, s), 6.09 (2H, s), 6.86-6.90 (2H, m), 6.95-7.01 (2H, m).

Workup

waitthe reaction mixture was left
stirringstirring at 25° C. overnight
customDMF was partially removed under reduced pressure
customto give residue
extractionextracted with dichloromethane
customto give white solid
customRecrystallization with acetone

Sources & evidence

ORD record: ord-117d26b66f6740e998de4feed01a4394
Source dataset: uspto-grants-2013_09
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08530491B2

Reaction notes

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