Hydroxylamine → Tert-butyl-4-({[4-(2-butynyloxy)phenyl]sulfanyl)methyl)-4-[(hydroxyamino)carbonyl]-1-piperidinecarboxylate

HRID 278334Notes

Reaction equation

HRID 278334 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][C:11]([CH2:17][S:18][C:19]2[CH:24]=[CH:23][C:22]([O:25][CH2:26][C:27]#[C:28][CH3:29])=[CH:21][CH:20]=2)([C:14](O)=[O:15])[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[OH:30][N:31]1C2C=CC=CC=2N=N1.Cl.CN(C)CCCN=C=NCC.NO>CN(C=O)C.CCOC(C)=O>[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][C:11]([CH2:17][S:18][C:19]2[CH:24]=[CH:23][C:22]([O:25][CH2:26][C:27]#[C:28][CH3:29])=[CH:21][CH:20]=2)([C:14]([NH:31][OH:30])=[O:15])[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2]

Participants

7

Reactant 4

HCID 787HydroxylamineHCID 757711-HydroxybenzotriazoleHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 542579274-(4-But-2-ynyloxy-phenylsulfanylmethyl)-piperidine-1,4-dicarboxylic acid mono-tert-butyl ester

Product 1

HCID 23513813Tert-butyl-4-({[4-(2-butynyloxy)phenyl]sulfanyl)methyl)-4-[(hydroxyamino)carbonyl]-1-piperidinecarboxylateYield 36.2%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of 0.204 g (0.49 mmol) of 4-(4-But-2-ynyloxy-phenylsulfanylmethyl)-piperidine-1,4-dicarboxylic acid mono-tert-butyl ester, 0.079 g (0.58 mmol) of 1-hydroxybenzotriazole in 2.5 mL of DMF was added 0.112 g (0.84 mmol) of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride, and stirred at room temperature for 1 h. Then added 0.3 mL of 50% aqueous hydroxylamine and stirred for 18 h. The resulting mixture was diluted with EtOAc, washed with H2O, brine, dried over MgSO4, filtered and concentrated in vacuo. The residue was chromatographed on silica gel eluting with 1.5% MeOH/CH2Cl2 to provide 0.077 g (36%) of the desired product as a white solid. Electrospray Mass Spec: 435.2 (M+H)+

Workup

  1. stirringstirred for 18 h
  2. washwashed with H2O, brine
  3. dry with materialdried over MgSO4
  4. filtrationfiltered
  5. concentrationconcentrated in vacuo
  6. customThe residue was chromatographed on silica gel eluting with 1.5% MeOH/CH2Cl2

Sources & evidence

ORD record
ord-e35fe10439134050beffe01bb91795e3
Source dataset
uspto-grants-2002_03
Patent number
US06358980B1

Reaction notes

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