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Trifluoroacetic acid → 6-(2-fluoro-5-((1R)-1-(1-piperazinyl)ethyl)-3-pyridinyl)-N,N-bis(4-methoxybenzyl)-2-methyl-4-pyrimidinamine

HRID 1621878
Notes
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Reaction equation

HRID 1621878 reaction equation
[CH3:1][O:2][C:3]1[CH:48]=[CH:47][C:6]([CH2:7][N:8]([CH2:38][C:39]2[CH:44]=[CH:43][C:42]([O:45][CH3:46])=[CH:41][CH:40]=2)[C:9]2[N:14]=[C:13]([CH3:15])[N:12]=[C:11]([C:16]3[CH:17]=[C:18]([C@H:23]([N:25]4[CH2:30][CH2:29][N:28](C(OC(C)(C)C)=O)[CH2:27][CH2:26]4)[CH3:24])[CH:19]=[N:20][C:21]=3[F:22])[CH:10]=2)=[CH:5][CH:4]=1.C(O)(C(F)(F)F)=O>C(Cl)Cl>[F:22][C:21]1[C:16]([C:11]2[N:12]=[C:13]([CH3:15])[N:14]=[C:9]([N:8]([CH2:7][C:6]3[CH:47]=[CH:48][C:3]([O:2][CH3:1])=[CH:4][CH:5]=3)[CH2:38][C:39]3[CH:40]=[CH:41][C:42]([O:45][CH3:46])=[CH:43][CH:44]=3)[CH:10]=2)=[CH:17][C:18]([C@H:23]([N:25]2[CH2:26][CH2:27][NH:28][CH2:29][CH2:30]2)[CH3:24])=[CH:19][N:20]=1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 66600507tert-butyl 4-((1R)-1-(5-(6-(bis(4-methoxybenzyl)amino)-2-methyl-4-pyrimidinyl)-6-fluoro-3-pyridinyl)ethyl)-1-piperazinecarboxylate

Product 1

HCID 685113046-(2-fluoro-5-((1R)-1-(1-piperazinyl)ethyl)-3-pyridinyl)-N,N-bis(4-methoxybenzyl)-2-methyl-4-pyrimidinamineYield 85.1%

Reagents, catalysts & solvents 1

HCID 6344Dichloromethane
Solvent

Procedure

A mixture of tert-butyl 4-((1R)-1-(5-(6-(bis(4-methoxybenzyl)amino)-2-methyl-4-pyrimidinyl)-6-fluoro-3-pyridinyl)ethyl)-1-piperazinecarboxylate (0.57 g, 0.87 mmol) in CH2Cl2 (4.3 mL) at 0° C. was treated with TFA (1.29 mL, 17.36 mmol). The reaction mixture was allowed to warm up to RT. After 90 minutes the reaction mixture was concentrated and the residue was dissolved in CH2Cl2 and saturated NaHCO3 (aq.). The layers were separated and the aqueous layer was extracted with CH2Cl2 (2×). The combined organic layers were dried over anhydrous Na2SO4, filtered and concentrated to give 6-(2-fluoro-5-((1R)-1-(1-piperazinyl)ethyl)-3-pyridinyl)-N,N-bis(4-methoxybenzyl)-2-methyl-4-pyrimidinamine (0.41 g, 0.74 mmol, 85% yield). m/z (ESI, +ve) 557.2 (M+H)+. 1H NMR (400 MHz, CDCl3) δ 8.41 (dd, J=9.29, 2.45 Hz, 1H); 8.14-8.18 (m, 1H); 7.18 (d, J=7.43 Hz, 4H); 6.86 (d, J=8.61Hz, 4H); 6.83 (br. s, 1H); 4.74 (br. s., 4H); 3.79 (s, 6H); 3.57 (q, J=6.78 Hz, 1H); 2.96 (m, 4H); 2.62 (s, 3H); 2.57 (br. s., 2H); 2.44-2.51 (m, 2H); 1.40 (d, J=6.85 Hz, 3H).

Workup

  1. concentrationAfter 90 minutes the reaction mixture was concentrated
  2. dissolutionthe residue was dissolved in CH2Cl2
  3. customThe layers were separated
  4. extractionthe aqueous layer was extracted with CH2Cl2 (2×)
  5. dry with materialThe combined organic layers were dried over anhydrous Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated

Sources & evidence

ORD record
ord-f77d0689194d41e4929bdc1dc2ac344b
Source dataset
uspto-grants-2014_07
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08772480B2

Reaction notes

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