1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → HCID 178473365, Verbindung

HRID 982953

Reaktionsgleichung

Reaktionsgleichung von HRID 982953
[C:1]([C:4]1[CH:13]=[C:12]([O:14][CH3:15])[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[N:5]=1)([OH:3])=O.[CH2:16]([O:18][C:19]([N:21]1[CH2:26][CH2:25][N:24]([C:27]([CH:29]([NH2:36])[CH2:30][C:31]2[N:32]=[CH:33][NH:34][CH:35]=2)=[O:28])[CH2:23][CH2:22]1)=[O:20])[CH3:17].CCN=C=NCCCN(C)C.C1C=CC2N(O)N=NC=2C=1>C1COCC1.C(Cl)Cl.CO.C(N(CC)CC)C>[CH2:16]([O:18][C:19]([N:21]1[CH2:26][CH2:25][N:24]([C:27]([CH:29]([NH:36][C:1]([C:4]2[CH:13]=[C:12]([O:14][CH3:15])[C:11]3[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=3)[N:5]=2)=[O:3])[CH2:30][C:31]2[N:32]=[CH:33][NH:34][CH:35]=2)=[O:28])[CH2:23][CH2:22]1)=[O:20])[CH3:17]

Komponenten

9

Edukt 4

HCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 757711-HydroxybenzotriazoleHCID 5945964-Methoxy-2-quinolinecarboxylic acidHCID 1784734004-Ethoxycarbonyl-1-(1-amino-2-(imidazol-4-yl)ethyl)carbonylpiperazine

Produkt 1

HCID 178473365HCID 178473365, Verbindung

Reagenzien, Katalysatoren, Lösungsmittel 4

HCID 887MethanolLösungsmittelHCID 6344DichloromethaneLösungsmittel2×HCID 8028TetrahydrofuranLösungsmittel2×HCID 8471TriethylamineLösungsmittel2×

Versuchsvorschrift

To a solution of N-t-butoxycarbonylhistidine (2 g, 7.05 mmol) in THF (30 mL) was added 1-ethoxycarbonylpiperazine (1.36 mL, 1.3 eq.), EDCI (1.65 g, 1.2 eq.), HOBt (1.2 g, 1.1 eq.) and the reaction mixture was stirred overnight. The reaction mixture was evaporated in vacuo to afford a crude product, which was dissolved in ethyl acetate, washed with saturated NaHCO3, 1 M NaHSO4 and brine. The organic layer was evaporated. Flash column chromatography with 2%-6% MeOH in CH2Cl2 afforded 4-ethoxycarbonyl-1-(1-(t-butoxycarbonyl)amino-2-(imidazol-4-yl)ethyl)carbonylpiperazine (820 mg). 4-Ethoxycarbonyl-1-(1-(t-butoxycarbonyl)amino-2-(imidazol-4-yl)ethyl)carbonylpiperazine (200 mg, 0.5 mmol) was treated with trifluoroacetic acid/methylene chloride (1:1, 2.0 mL) with stirring at ambient temperture for 1 hour. Evaporation gave 4-ethoxycarbonyl-1-(1-amino-2-(imidazol-4-yl)ethyl)carbonylpiperazine, which was treated with methylene chloride and triethylamine (0.5 mL), and the solvents evaporated to again afford 4-ethoxycarbonyl-1-(1-amino-2-(imidazol-4-yl)ethyl)carbonylpiperazine. To a solution of 2-carboxy-4-methoxyquinoline (124 mg, 0.61 mmol) in THF (4 mL) was added a mixture of 4-ethoxycarbonyl-1-(1-amino-2-(imidazol-4-yl)ethyl)carbonylpiperazine, THF (2 mL), and triethylamine (0.1 mL), followed by addition of EDCI (136 mg, 1.4 eq.), HOBt (98 mg, 1.4 eq.). The resulting mixture was stirred overnight. The crude product (245 mg, foam) was isolated from the reaction mixture by the same methods employed above. Flash column chromatography with 25%-6% MeOH in methylene chloride afforded 2-[1-(4-(ethoxycarbonyl)piperazin-1-yl)carbonyl-2-(imidazol-4-yl)ethyl]aminocarbonyl-4-methoxyquinoline; NMR (CDCl3) 1.25 (t, 3), 3.10-3.30 (m, 2), 3.20-3.65 (m, 9), 4.10 (m, 5), 5.40 (m, 1), 6.90 (s, 1), 7.55-7.60 (m, 3), 7.70 (t, 1), 8.02 (d, 1), 8.20 (d, 1), 9.0 (d, 1) ppm.

Aufarbeitung

  1. customthe solvents evaporated to again afford 4-ethoxycarbonyl-1-(1-amino-2-(imidazol-4-yl)ethyl)carbonylpiperazine
  2. customThe crude product (245 mg, foam) was isolated from the reaction mixture by the same methods

Quellen und Nachweise

ORD-Eintrag
ord-038f99cda28441a3bba501fff0e35b7a
Quelldatensatz
uspto-grants-2005_03
Patentnummer
US06861424B2

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