4-Chlorobenzylamine → 4-Tert-butoxycarbonylamino-4-(4-chloro-benzylcarbamoyl)-piperidine-1-carboxylic acid tert-butyl ester

HRID 2406002Notes

Reaction equation

HRID 2406002 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][C:11]([NH:17][C:18]([O:20][C:21]([CH3:24])([CH3:23])[CH3:22])=[O:19])([C:14](O)=[O:15])[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F.C(N(C(C)C)C(C)C)C.[Cl:58][C:59]1[CH:66]=[CH:65][C:62]([CH2:63][NH2:64])=[CH:61][CH:60]=1>O.ClCCl.CN(C=O)C>[C:1]([O:5][C:6]([N:8]1[CH2:9][CH2:10][C:11]([NH:17][C:18]([O:20][C:21]([CH3:22])([CH3:24])[CH3:23])=[O:19])([C:14](=[O:15])[NH:64][CH2:63][C:62]2[CH:65]=[CH:66][C:59]([Cl:58])=[CH:60][CH:61]=2)[CH2:12][CH2:13]1)=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

8

Reactant 4

HCID 660364-ChlorobenzylamineHCID 81531DiisopropylethylamineHCID 12682251-(tert-Butoxycarbonyl)-4-((tert-butoxycarbonyl)amino)piperidine-4-carboxylic acidHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)

Product 1

HCID 451394444-Tert-butoxycarbonylamino-4-(4-chloro-benzylcarbamoyl)-piperidine-1-carboxylic acid tert-butyl esterYield 86.4%

Reagents, catalysts & solvents 3

HCID 962WaterSolventHCID 6228DimethylformamideSolventHCID 6344DichloromethaneSolvent

Procedure

Dry DMF (1 mL) was added to a mixture of 4-tert-butoxycarbonylamino-piperidine-1,4-dicarboxylic acid mono tert-butyl ester (151 mg, 0.44 mmol) and HATU (220 mg, 0.58 mmol) under nitrogen. N-Ethyldiisopropylamine (0.38 mL, 2.1 mmol) was added to the solution and the reaction mixture was stirred for 15 min. 4-Chlorobenzylamine (70 uL, 0.57 mmol) was added and the solution was stirred for 23 h at rt and under nitrogen. The reaction mixture was partioned between dichloromethane (10 mL) and water (10 mL). The aqueous phase was further extracted with dichloromethane (20 mL). The combined organic layers were dried (Mg2SO4), filtered and concentrated. Flash column chromatography on silica, eluting with 4% methanol in dichloromethane, gave 4-tert-butoxycarbonylamino-4-(4-chloro-benzylcarbamoyl)-piperidine-1-carboxylic acid tert-butyl ester (177 mg, 0.38 mmol, 86%). LC-MS (LCT2) m/z 490 [M+Na+], Rt 8.09 min.

Workup

  1. stirringthe solution was stirred for 23 h at rt and under nitrogen
  2. extractionThe aqueous phase was further extracted with dichloromethane (20 mL)
  3. dry with materialThe combined organic layers were dried (Mg2SO4)
  4. filtrationfiltered
  5. concentrationconcentrated
  6. washFlash column chromatography on silica, eluting with 4% methanol in dichloromethane

Sources & evidence

ORD record
ord-ac16d889a1e14f558bc4deae253acb8d
Source dataset
uspto-grants-2014_08
Patent number
US08809336B2

Reaction notes

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