Triethylamine → tert-Butyl [(1S,3R)-3-ethyl-3-(4-[4-(trifluoromethyl)pyridin-2-yl]piperazin-1-ylcarbonyl)cyclopentyl]carbamate

HRID 1044618Notes

Reaction equation

HRID 1044618 reaction equation
[C:1]([O:5][C:6]([NH:8][C@H:9]1[CH2:13][CH2:12][C@@:11]([CH2:17][CH3:18])([C:14]([OH:16])=O)[CH2:10]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].Cl.Cl.[F:21][C:22]([F:36])([F:35])[C:23]1[CH:28]=[CH:27][N:26]=[C:25]([N:29]2[CH2:34][CH2:33][NH:32][CH2:31][CH2:30]2)[CH:24]=1.C(N(CC)CC)C>CN(C=O)C>[C:1]([O:5][C:6](=[O:7])[NH:8][C@H:9]1[CH2:13][CH2:12][C@@:11]([CH2:17][CH3:18])([C:14]([N:32]2[CH2:33][CH2:34][N:29]([C:25]3[CH:24]=[C:23]([C:22]([F:36])([F:21])[F:35])[CH:28]=[CH:27][N:26]=3)[CH2:30][CH2:31]2)=[O:16])[CH2:10]1)([CH3:2])([CH3:3])[CH3:4]

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 68597010(1R,3S)-3-[(tert-butoxycarbonyl)amino]-1-ethylcyclopentanecarboxylic acidHCID 685975881-[4-(Trifluoromethyl)pyridin-2-yl]piperazine dihydrochloride

Product 1

HCID 86633371tert-Butyl [(1S,3R)-3-ethyl-3-(4-[4-(trifluoromethyl)pyridin-2-yl]piperazin-1-ylcarbonyl)cyclopentyl]carbamateYield 72.9%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of (1R,3S)-3-[(tert-butoxycarbonyl)amino]-1-ethylcyclopentanecarboxylic acid (0.30 g, 1.2 mmol) and 1-[4-(trifluoromethyl)pyridin-2-yl]piperazine dihydrochloride (0.39 g, 1.3 mmol) in DMF (10 mL) under N2 was added triethylamine (0.65 mL, 4.7 mmol) and O-(Benzotriazol-1-yl)-N,N,N′,N-tetramethyluronium hexafluorophosphate (0.663 g, 1.75 mmol). After being stirred at room temperature overnight, the reaction was quenched with saturated NaHCO3 and extracted with methylene chloride three times. The combined extracts were dried (MgSO4), filtered, concentrated and purified by flash column chromatography to yield the desired product (400 mg, 72.9%). MS calculated for C23H34F3N4O3: (M+H) 471.3; found 371.2 (M+H-Boc).

Workup

  1. customthe reaction was quenched with saturated NaHCO3
  2. extractionextracted with methylene chloride three times
  3. dry with materialThe combined extracts were dried (MgSO4)
  4. filtrationfiltered
  5. concentrationconcentrated
  6. custompurified by flash column chromatography

Sources & evidence

ORD record
ord-2bd6f726cecd48b8b221e75876b69d72
Source dataset
uspto-grants-2013_10
Patent number
US08563582B2

Reaction notes

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