1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → N-[(R)-1-[3-(1-tert-butoxycarbonyl-4-piperidyl)-(E)-acryloyl]-3-piperidylcarbonyl]-3(S)-ethynyl-beta-alanine ethyl ester

HRID 1934385Notes

Reaction equation

HRID 1934385 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:13][CH2:12][CH:11](/[CH:14]=[CH:15]/[C:16]([N:18]2[CH2:23][CH2:22][CH2:21][C@@H:20]([C:24](O)=[O:25])[CH2:19]2)=[O:17])[CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].Cl.[CH2:28]([O:30][C:31](=[O:37])[CH2:32][C@@H:33]([C:35]#[CH:36])[NH2:34])[CH3:29].ON1C2C=CC=CC=2N=N1.C(N=C=NCCCN(C)C)C>CN(C)C=O.O>[CH2:28]([O:30][C:31](=[O:37])[CH2:32][C@@H:33]([C:35]#[CH:36])[NH:34][C:24]([C@@H:20]1[CH2:21][CH2:22][CH2:23][N:18]([C:16](=[O:17])/[CH:15]=[CH:14]/[CH:11]2[CH2:12][CH2:13][N:8]([C:6]([O:5][C:1]([CH3:3])([CH3:2])[CH3:4])=[O:7])[CH2:9][CH2:10]2)[CH2:19]1)=[O:25])[CH3:29]

Participants

7

Reactant 4

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 757711-HydroxybenzotriazoleHCID 69817990(R)-1-[3-(1-tert-butoxycarbonyl-4-piperidyl)-(E)-acryloyl]-3-piperidinecarboxylic acidHCID 86751219Ethyl (3s)-3-aminopent-4-ynoate hydrochloride

Product 1

HCID 86758026N-[(R)-1-[3-(1-tert-butoxycarbonyl-4-piperidyl)-(E)-acryloyl]-3-piperidylcarbonyl]-3(S)-ethynyl-beta-alanine ethyl esterYield 101.3%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

To a mixture of (R)-1-[3-(1-tert-butoxycarbonyl-4-piperidyl)-(E)-acryloyl]-3-piperidinecarboxylic acid (1 g), 3(S)-ethynyl-β-alanine ethyl ester hydrochloride (0.48 g) and 1-hydroxybenzotriazole (0.37 g) in dimethylformamide (10 ml) was added 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (0.5 ml) at 0° C. The reaction mixture was stirred overnight at room temperature, and then poured into water. The whole was extracted with ethyl acetate, washed with aqueous saturated NaHCO3, water, and brine, dried over MgSO4, and evaporated in vacuo, subsequently. The residue was purified by column chromatography on silica gel eluting with CHCl3-MeOH (99:1) to give N-[(R)-1-[3-(1-tert-butoxycarbonyl-4-piperidyl)-(E)-acryloyl]-3-piperidylcarbonyl]-3(S)-ethynyl-β-alanine ethyl ester as a pale yellow oil (1.34 g).

Workup

  1. extractionThe whole was extracted with ethyl acetate
  2. washwashed with aqueous saturated NaHCO3, water, and brine
  3. dry with materialdried over MgSO4
  4. customevaporated in vacuo
  5. customThe residue was purified by column chromatography on silica gel eluting with CHCl3-MeOH (99:1)

Sources & evidence

ORD record
ord-0f2c6fa004fd4af3a0a532d6e21c69a0
Source dataset
uspto-grants-2002_05
Patent number
US06384028B1

Reaction notes

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