3-Ethylaniline → 3-(2-amino-7,8-dihydropyrido[4,3-d]pyrimidin-6(5H)-yl)-N-(3-ethylphenyl)benzamide

HRID 338684Notes

Reaction equation

HRID 338684 reaction equation
[NH2:1][C:2]1[N:3]=[CH:4][C:5]2[CH2:11][N:10]([C:12]3[CH:13]=[C:14]([CH:18]=[CH:19][CH:20]=3)[C:15](O)=[O:16])[CH2:9][CH2:8][C:6]=2[N:7]=1.C(N(CC)C(C)C)(C)C.CCOC(C(C#N)=NOC(N1CCOCC1)=[N+](C)C)=O.F[P-](F)(F)(F)(F)F.[CH2:57]([C:59]1[CH:60]=[C:61]([CH:63]=[CH:64][CH:65]=1)[NH2:62])[CH3:58]>CN(C=O)C>[NH2:1][C:2]1[N:3]=[CH:4][C:5]2[CH2:11][N:10]([C:12]3[CH:13]=[C:14]([CH:18]=[CH:19][CH:20]=3)[C:15]([NH:62][C:61]3[CH:63]=[CH:64][CH:65]=[C:59]([CH2:57][CH3:58])[CH:60]=3)=[O:16])[CH2:9][CH2:8][C:6]=2[N:7]=1

Participants

6

Reactant 4

HCID 114753-EthylanilineHCID 81531DiisopropylethylamineHCID 75951468(1-Cyano-2-ethoxy-2-oxoethylidenaminooxy)dimethylamino-morpholino-carbenium hexafluorophosphateHCID 866958153-(2-amino-7,8-dihydropyrido[4,3-d]pyrimidin-6(5H)-yl)benzoic acid

Product 1

HCID 717355263-(2-amino-7,8-dihydropyrido[4,3-d]pyrimidin-6(5H)-yl)-N-(3-ethylphenyl)benzamideYield 38%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

A mixture of 3-(2-amino-7,8-dihydropyrido[4,3-d]pyrimidin-6(5H)-yl)benzoic acid (41 mg, 0.15 mmol), N,N-diisopropylethylamine (0.105 mL, 0.60 mmol), and COMU (68 mg, 0.158 mmol) in 1.5 mL DMF was stirred at room temperature for 2 minutes, then 3-ethylaniline (0.127 mL, 0.90 mmol) added and the reaction continued for 4 hours at room temperature. The reaction mixture was partitioned between EtOAc and aqueous Na2CO3 solution, the EtOAc layer washed with H2O, brine, dried with anhydrous Na2SO4 and rotary evaporated. The resulting solid was chromatographed eluting with portions of CHCl3, then 1:1 CHCl3:EtOAc, and then 5% MeOH/CHCl3. The obtained solid was then triturated with an EtOAc/hexane mixture to give the title compound as a light beige solid (21 mg, 38%). 1H NMR (DMSO-d6) δ: 10.08 (s, 1H), 8.13 (s, 1H), 7.61-7.64 (m, 1H), 7.57-7.61 (m, 1H), 7.49-7.52 (m, 1H), 7.32-7.40 (m, 2H), 7.18-7.29 (m, 2H), 6.93-6.98 (m, 1H), 6.41 (s, 2H), 4.29 (s, 2H), 3.65 (t, J=6.0 Hz, 2H), 2.77 (t, J=5.9 Hz, 2H), 2.61 (q, J=7.6 Hz, 2H), 1.20 (t, J=7.6 Hz, 3H)

Workup

  1. waitthe reaction continued for 4 hours at room temperature
  2. customThe reaction mixture was partitioned between EtOAc and aqueous Na2CO3 solution
  3. washthe EtOAc layer washed with H2O, brine
  4. dry with materialdried with anhydrous Na2SO4 and rotary evaporated
  5. customThe resulting solid was chromatographed
  6. washeluting with portions of CHCl3
  7. customThe obtained solid was then triturated with an EtOAc/hexane mixture

Sources & evidence

ORD record
ord-4b382b29c6854dbe8a312b6e9038b01c
Source dataset
uspto-grants-2014_11
Patent number
US08889870B2

Reaction notes

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