Cesium carbonate → (R)-tert-butyl 4-((5-(4-(bis(4-methoxybenzyl)amino)-6-methyl-1,3,5-triazin-2-yl)-6-fluoropyridin-3-yl)methyl)-3-methylpiperazine-1-carboxylate

HRID 1812321Notes

Reaction equation

HRID 1812321 reaction equation
Cl[C:2]1[CH:3]=[C:4]([C:9]2[N:14]=[C:13]([CH3:15])[N:12]=[C:11]([N:16]([CH2:26][C:27]3[CH:32]=[CH:31][C:30]([O:33][CH3:34])=[CH:29][CH:28]=3)[CH2:17][C:18]3[CH:23]=[CH:22][C:21]([O:24][CH3:25])=[CH:20][CH:19]=3)[N:10]=2)[C:5]([F:8])=[N:6][CH:7]=1.C1(P(C2CCCCC2)C2C=CC=CC=2C2C(C(C)C)=CC(C(C)C)=CC=2C(C)C)CCCCC1.C(=O)([O-])[O-].[Cs+].[Cs+].[C:75]([O:79][C:80]([N:82]1[CH2:87][CH2:86][N:85]([CH2:88][B-](F)(F)F)[C@H:84]([CH3:93])[CH2:83]1)=[O:81])([CH3:78])([CH3:77])[CH3:76].[K+].C(N1CCN[C@H](C)C1)(OC(C)(C)C)=O>C([O-])(=O)C.[Pd+2].C([O-])(=O)C>[CH3:25][O:24][C:21]1[CH:22]=[CH:23][C:18]([CH2:17][N:16]([CH2:26][C:27]2[CH:32]=[CH:31][C:30]([O:33][CH3:34])=[CH:29][CH:28]=2)[C:11]2[N:12]=[C:13]([CH3:15])[N:14]=[C:9]([C:4]3[CH:3]=[C:2]([CH2:88][N:85]4[CH2:86][CH2:87][N:82]([C:80]([O:79][C:75]([CH3:78])([CH3:77])[CH3:76])=[O:81])[CH2:83][C@H:84]4[CH3:93])[CH:7]=[N:6][C:5]=3[F:8])[N:10]=2)=[CH:19][CH:20]=1

Participants

7

Reactant 5

HCID 10796Cesium carbonateHCID 2756811(R)-1-Boc-3-methylpiperazineHCID 111557942-Dicyclohexylphosphino-2',4',6'-triisoprophylbiphenylHCID 666005044-(5-chloro-2-fluoropyridin-3-yl)-N,N-bis(4-methoxybenzyl)-6-methyl-1,3,5-triazin-2-amineHCID 71501915potassium (R)-((4-(tert-butoxycarbonyl)-2-methylpiperazin-1-yl)methyl)trifluoroborate

Product 1

HCID 66612109(R)-tert-butyl 4-((5-(4-(bis(4-methoxybenzyl)amino)-6-methyl-1,3,5-triazin-2-yl)-6-fluoropyridin-3-yl)methyl)-3-methylpiperazine-1-carboxylateYield 73.7%

Reagents, catalysts & solvents 1

HCID 167845palladium(II) acetateCatalyst

Conditions

Temperature
85 °C

Procedure

In a 5 mL microwave tube was weighed 4-(5-chloro-2-fluoropyridin-3-yl)-N,N-bis(4-methoxybenzyl)-6-methyl-1,3,5-triazin-2-amine (1.00 g, 2.084 mmol; Example 313, Step 1), 2-(dicyclohexylphosphino)-2′,4′,6′,-tri-i-propyl-1,1′-biphenyl (0.099 g, 0.208 mmol), cesium carbonate (2.037 g, 6.25 mmol), potassium (R)-((4-(tert-butoxycarbonyl)-2-methylpiperazin-1-yl)methyl)trifluoroborate (prepared similarly according to Example 270, Stepl, from (R)-4-N-boc-2-methyl-piperazine (Sigma Adrich, Inc.), 0.701 g, 2.188 mmol,), palladium acetate (0.023 g, 0.104 mmol) followed by purging with argon. The solids were then treated with THF (10.00 mL), water (1.0 mL) and heated under a microwave irradiation at 85° C. overnight. The mixture was filtered through a short path of Celite® (diatomaceous earth), washed with ethyl acetate (3×), and concentrated. The crude product was adsorbed onto a plug of silica gel and chromatographed through a silica gel column (100% DCM to 5% MeOH in DCM) to obtain the desired product (R)-tert-butyl 4-((5-(4-(bis(4-methoxybenzyl)amino)-6-methyl-1,3,5-triazin-2-yl)-6-fluoropyridin-3-yl)methyl)-3-methylpiperazine-1-carboxylate (1.01 g, 1.535 mmol, 73.7% yield) as a yellow foam. m/z (ESI, +ve ion) 658 (M+H)+.

Workup

  1. customIn a 5 mL microwave tube was weighed
  2. customby purging with argon
  3. additionThe solids were then treated with THF (10.00 mL), water (1.0 mL)
  4. filtrationThe mixture was filtered through a short path of Celite® (diatomaceous earth)
  5. washwashed with ethyl acetate (3×)
  6. concentrationconcentrated
  7. customchromatographed through a silica gel column (100% DCM to 5% MeOH in DCM)

Sources & evidence

ORD record
ord-e482bb9e26664ee4892b7a8d39e4061e
Source dataset
uspto-grants-2013_01
Patent number
US08362241B2

Reaction notes

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