Triethylamine → (R)-tert-butyl 3-(pyrrolidine-1-carbonyl)piperidine-1-carboxylate

HRID 931179Notes

Reaction equation

HRID 931179 reaction equation
[NH:1]1[CH2:5][CH2:4][CH2:3][CH2:2]1.[C:6]([O:10][C:11]([N:13]1[CH2:18][CH2:17][CH2:16][C@@H:15]([C:19](O)=[O:20])[CH2:14]1)=[O:12])([CH3:9])([CH3:8])[CH3:7].OC1C2N=NNC=2C=CC=1.Cl.C(N=C=NCCCN(C)C)C.C(N(CC)CC)C>CN(C)C=O>[N:1]1([C:19]([C@@H:15]2[CH2:16][CH2:17][CH2:18][N:13]([C:11]([O:10][C:6]([CH3:9])([CH3:8])[CH3:7])=[O:12])[CH2:14]2)=[O:20])[CH2:5][CH2:4][CH2:3][CH2:2]1

Participants

7

Reactant 5

HCID 8471TriethylamineHCID 31268PyrrolidineHCID 6435161-(1,1-Dimethylethyl) (3R)-1,3-piperidinedicarboxylateHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 178418300HCID 178418300, compound

Product 1

HCID 28167609(R)-tert-butyl 3-(pyrrolidine-1-carbonyl)piperidine-1-carboxylate

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
30 °C

Procedure

To a solution of pyrrolidine (2.134 g, 30 mmol) in N,N-dimethylformamide (240 mL) was added (R)-1-(tert-butoxycarbonyl)piperidine-3-carboxylic acid (6.878 g, 30 mmol). Then hydroxybenzotriazole (1.028 g, 6 mmol), 1-ethyl-3-[3-(dimethylamino)propyl]carbodiimide hydrochloride (5.751 g, 30 mmol), and triethylamine (7.59 g, 75 mmol) were added sequentially. The mixture was stirred at 30° C. for 16 h. The solvent was removed under reduced pressure and an aqueous solution of sodium bicarbonate (200 mL, 0.1M) was added. The mixture was extracted with ethyl acetate (200 mL×3) and the combined organics were dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure to afford (R)-tert-butyl 3-(pyrrolidine-1-carbonyl)piperidine-1-carboxylate, which was used in the next step without further purification.

Workup

  1. customThe solvent was removed under reduced pressure
  2. additionan aqueous solution of sodium bicarbonate (200 mL, 0.1M) was added
  3. extractionThe mixture was extracted with ethyl acetate (200 mL×3)
  4. dry with materialthe combined organics were dried over anhydrous sodium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-66b90b7ff3f24923b388fe9df1a315c1
Source dataset
uspto-grants-2016_03
Patent number
US09296745B2

Reaction notes

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