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

HRID 270616Notes

Reaction equation

HRID 270616 reaction equation
[C:1]([O:5][C:6]([NH:8][C@@H:9]1[CH2:13][CH2:12][C@:11]([C@H:17]2[CH2:21][CH2:20][O:19][CH2:18]2)([C:14]([OH:16])=O)[CH2:10]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].Cl.Cl.[F:24][C:25]([F:39])([F:38])[C:26]1[CH:31]=[CH:30][N:29]=[C:28]([N:32]2[CH2:37][CH2:36][NH:35][CH2:34][CH2:33]2)[CH:27]=1.C(N(CC)CC)C.F[P-](F)(F)(F)(F)F.N1(OC(N(C)C)=[N+](C)C)C2C=CC=CC=2N=N1>CN(C=O)C.C(Cl)Cl>[O:19]1[CH2:20][CH2:21][C@H:17]([C@:11]2([C:14]([N:35]3[CH2:36][CH2:37][N:32]([C:28]4[CH:27]=[C:26]([C:25]([F:39])([F:24])[F:38])[CH:31]=[CH:30][N:29]=4)[CH2:33][CH2:34]3)=[O:16])[CH2:12][CH2:13][C@@H:9]([NH:8][C:6](=[O:7])[O:5][C:1]([CH3:2])([CH3:3])[CH3:4])[CH2:10]2)[CH2:18]1

Participants

7

Reactant 4

HCID 8471TriethylamineHCID 2733084Methanaminium, N-((1H-benzotriazol-1-yloxy)(dimethylamino)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)HCID 68596411(1S,3R)-3-[(tert-Butoxycarbonyl)amino]-1-[(3R)-tetrahydrofuran-3-yl]cyclopentanecarboxylic AcidHCID 685975881-[4-(Trifluoromethyl)pyridin-2-yl]piperazine dihydrochloride

Product 1

HCID 86641538tert-Butyl [(1R,3S)-3-[(3R)-Tetrahydrofuran-3-yl]-3-(4-[4-(trifluoromethyl)pyridin-2-yl]piperazin-1-ylcarbonyl)cyclopentyl]carbamateYield 45.1%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 6344DichloromethaneSolvent

Procedure

(1S,3R)-3-[(tert-Butoxycarbonyl)amino]-1-[(3R)-tetrahydrofuran-3-yl]cyclopentanecarboxylic acid (350.0 mg, 1.169 mmol), 1-[4-(trifluoromethyl)pyridin-2-yl]piperazine dihydrochloride (391.1 mg, 1.286 mmol), triethylamine (0.652 mL, 4.68 mmol) and O-(benzotriazol-1-yl)-N,N,N′,N′-tetramethyluronium hexafluorophosphate (665.1 mg, 1.754 mol) (HBTU) were mixed in dry DMF (8.0 mL). After being stirred at room temperature overnight, the reaction mixture was diluted with CH2Cl2 and washed with saturated Na2CO3. The aqueous layer was extracted with CH2Cl2 four times. The combined organic layers were dried (MgSO4), concentrated and purified by flash chromatography (Combi-flash system, 0-50% EtOAc in hexanes, gradient elution, 40 gram column) to provide the desired product (270 mg, 45%). MS calculated for C25H36F3N4O4 (M+H) 513.3; found 513.3.

Workup

  1. washwashed with saturated Na2CO3
  2. extractionThe aqueous layer was extracted with CH2Cl2 four times
  3. dry with materialThe combined organic layers were dried (MgSO4)
  4. concentrationconcentrated
  5. custompurified by flash chromatography (Combi-flash system, 0-50% EtOAc in hexanes, gradient elution, 40 gram column)

Sources & evidence

ORD record
ord-cf101e8bc5e1429d956ddb963519b333
Source dataset
uspto-grants-2008_11
Patent number
US07449467B2

Reaction notes

Loading…