Hydrazine → tert-Butyl 4-(hydrazinecarbonyl)piperidine-1-carboxylate

HRID 605018Notes

Reaction equation

HRID 605018 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11]([C:14]([OH:16])=O)[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].C(N1C=CN=C1)(N1C=CN=C1)=O.[NH2:29][NH2:30]>C(Cl)Cl>[NH:29]([C:14]([CH:11]1[CH2:12][CH2:13][N:8]([C:6]([O:5][C:1]([CH3:4])([CH3:3])[CH3:2])=[O:7])[CH2:9][CH2:10]1)=[O:16])[NH2:30]

Participants

5

Reactant 3

HCID 9321HydrazineHCID 682631,1'-CarbonyldiimidazoleHCID 3928711-(tert-Butoxycarbonyl)-4-piperidinecarboxylic acid

Product 1

HCID 22713165tert-Butyl 4-(hydrazinecarbonyl)piperidine-1-carboxylate

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

To a solution of 1-(tert-butoxycarbonyl)piperidine-4-carboxylic acid (120 g, 520 mmol) in DCM (250 mL) was added carbonyldiimidazole (96 g, 590 mmol) in portions at room temperature. After 30 minutes, the reaction mixture was added to a freshly prepared solution of hydrazine (27 g, 840 mmol) in DCM (100 mL). After 30 minutes, the reaction was washed with a saturated solution of sodium carbonate, brine, dried over sodium sulfate, filtered and concentrated. The resulting solid was suspended in ether and filtered to give tert-butyl 4-(hydrazinocarbonyl)piperidine-1-carboxylate as a white solid. 1H NMR (400 MHz, DMSO-d6): δ 9.00 (s, 1H), 4.15-4.10 (s, 2H), 3.95-3.90 (m, 2H), 2.80-2.60 (m, 2H), 2.25-2.20 (m, 1H), 1.62-1.55 (m, 2H), 1.40 (s, 9H).

Workup

  1. waitAfter 30 minutes
  2. washthe reaction was washed with a saturated solution of sodium carbonate, brine
  3. dry with materialdried over sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated
  6. filtrationfiltered

Sources & evidence

ORD record
ord-2eb049c4e9f44dcd8a60d3b31ee73f7e
Source dataset
uspto-grants-2011_03
Patent number
US07910561B2

Reaction notes

Loading…