Triethylamine → (E)-1-[4-(2,6-Dimethoxy-4-pyridyl)piperazin-1-yl]-4,4,5,5,5-pentafluoro-pent-2-en-1-one

HRID 333956Notes

Reaction equation

HRID 333956 reaction equation
[CH3:1][O:2][C:3]1[CH:8]=[C:7]([N:9]2[CH2:14][CH2:13][NH:12][CH2:11][CH2:10]2)[CH:6]=[C:5]([O:15][CH3:16])[N:4]=1.[F:17][C:18]([F:28])([C:24]([F:27])([F:26])[F:25])/[CH:19]=[CH:20]/[C:21](O)=[O:22].C(N(CC)CC)C.CN(C(ON1N=NC2C=CC=CC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F>ClCCl>[CH3:1][O:2][C:3]1[CH:8]=[C:7]([N:9]2[CH2:10][CH2:11][N:12]([C:21](=[O:22])/[CH:20]=[CH:19]/[C:18]([F:17])([F:28])[C:24]([F:25])([F:26])[F:27])[CH2:13][CH2:14]2)[CH:6]=[C:5]([O:15][CH3:16])[N:4]=1

Participants

6

Reactant 4

HCID 8471TriethylamineHCID 2733084Methanaminium, N-((1H-benzotriazol-1-yloxy)(dimethylamino)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 668358261-(2,6-Dimethoxy-4-pyridyl)piperazineHCID 86691160(2E)-4,4,5,5,5-Pentafluoro-2-pentenoic acid

Product 1

HCID 86691597(E)-1-[4-(2,6-Dimethoxy-4-pyridyl)piperazin-1-yl]-4,4,5,5,5-pentafluoro-pent-2-en-1-oneYield 17.7%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

1-(2,6-Dimethoxy-4-pyridyl)piperazine (30 mg, 0.13 mmol) was dissolved in anhydrous dichloromethane (2 ml) together with (E)-4,4,5,5,5-pentafluoropent-2-enoic acid (35 mg, 0.18 mmol), triethylamine (31 mg, 44 μl, 0.32 mmol), HBTU (74 mg, 0.15 mmol) and stirred at room temperature for two hours. The mixture was evaporated to dryness under reduced pressure and the residue was purified by preparative HPLC (gradient of water containing 0.1% NH3 and acetonitrile) to yield 9 mg of a solid (0.023 mmol, 15%).

Workup

  1. customThe mixture was evaporated to dryness under reduced pressure
  2. customthe residue was purified by preparative HPLC (gradient of water containing 0.1% NH3 and acetonitrile)

Sources & evidence

ORD record
ord-8dc5061ba248457db9fa847e4f5dbac1
Source dataset
uspto-grants-2014_11
Patent number
US08883791B2

Reaction notes

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