Sodium Carbonate → 5-(7-Methyl-4-morpholino-6,7-dihydro-[1,4]dioxino[2,3-d]pyrimidin-2-yl)pyrimidin-2-amine

HRID 528461Notes

Reaction equation

HRID 528461 reaction equation
Cl[C:2]1[N:3]=[C:4]([N:13]2[CH2:18][CH2:17][O:16][CH2:15][CH2:14]2)[C:5]2[O:11][CH2:10][CH:9]([CH3:12])[O:8][C:6]=2[N:7]=1.CC1(C)C(C)(C)OB([C:27]2[CH:28]=[N:29][C:30]([NH2:33])=[N:31][CH:32]=2)O1.C(=O)([O-])[O-].[Na+].[Na+]>C(#N)C.Cl[Pd](Cl)([P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)[P](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1>[CH3:12][CH:9]1[O:8][C:6]2[N:7]=[C:2]([C:27]3[CH:28]=[N:29][C:30]([NH2:33])=[N:31][CH:32]=3)[N:3]=[C:4]([N:13]3[CH2:18][CH2:17][O:16][CH2:15][CH2:14]3)[C:5]=2[O:11][CH2:10]1

Participants

6

Reactant 3

HCID 10340Sodium CarbonateHCID 177502122-Aminopyrimidine-5-boronic acid, pinacol esterHCID 867117462-Chloro-7-methyl-4-morpholin-4-yl-6,7-dihydro-[1,4]dioxino[2,3-d]pyrimidine

Product 1

HCID 734270385-(7-Methyl-4-morpholino-6,7-dihydro-[1,4]dioxino[2,3-d]pyrimidin-2-yl)pyrimidin-2-amine

Reagents, catalysts & solvents 2

HCID 178418476HCID 178418476, compoundCatalystHCID 6342AcetonitrileSolvent

Conditions

Temperature
140 °C

Procedure

A mixture of 2-chloro-7-methyl-4-morpholin-4-yl-6,7-dihydro-[1,4]dioxino[2,3-d]pyrimidine (99 mg, 0.36 mmol), 5-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-pyrimidin-2-ylamine (97 mg, 0.44 mmol), Pd(PPh3)2Cl2 (28 mg, 0.04 mmol) and sodium carbonate (1.2 mL, 1.20 mmol, 1M aqueous solution) in acetonitrile (1.2 mL) was degassed then heated at 140° C. for 25 minutes using microwave irradiation. The reaction mixture was filtered, flushing with ethyl acetate. The filtrate phases were separated and the aqueous layer extracted with ethyl acetate. The combined organic extracts were dried (Na2SO4) and concentrated in vacuo. The resulting residue was purified by column chromatography (SiO2, gradient 0-4% methanol in DCM) then triturated with diethyl ether affording 103 as a white solid (12 mg, 11%). LCMS: RT=3.06 min, [M+H]+=331. 1H NMR (400 MHz, DMSO): δ 8.90 (2H, s), 7.01 (2H, s), 4.57-4.47 (1H, m), 4.36 (1H, dd, J=11.41, 2.34 Hz), 3.82 (1H, dd, J=11.43, 7.60 Hz), 3.77-3.61 (8H, m), 1.34 (3H, d, J=6.44 Hz)

Workup

  1. customwas degassed
  2. custommicrowave irradiation
  3. filtrationThe reaction mixture was filtered
  4. customflushing with ethyl acetate
  5. customThe filtrate phases were separated
  6. extractionthe aqueous layer extracted with ethyl acetate
  7. dry with materialThe combined organic extracts were dried (Na2SO4)
  8. concentrationconcentrated in vacuo
  9. customThe resulting residue was purified by column chromatography (SiO2, gradient 0-4% methanol in DCM)
  10. customthen triturated with diethyl ether affording 103 as a white solid (12 mg, 11%)

Sources & evidence

ORD record
ord-687a77488b554046a93fce80f8611219
Source dataset
uspto-grants-2016_05
Patent number
US09346817B2

Reaction notes

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