Dimethylformamide → 1-(9H-fluoren-9-yl)methyl 4-tert-butyl 2-(2-(2-bromophenylamino)-2-oxoethyl)piperazine-1,4-dicarboxylate

HRID 80486

Reaktionsgleichung

Reaktionsgleichung von HRID 80486
[Br:1][C:2]1[CH:8]=[CH:7][CH:6]=[CH:5][C:3]=1[NH2:4].[CH:9]1[C:21]2[CH:20]([CH2:22][O:23][C:24]([N:26]3[CH2:31][CH2:30][N:29]([C:32]([O:34][C:35]([CH3:38])([CH3:37])[CH3:36])=[O:33])[CH2:28][CH:27]3[CH2:39][C:40](O)=[O:41])=[O:25])[C:19]3[C:14](=[CH:15][CH:16]=[CH:17][CH:18]=3)[C:13]=2[CH:12]=[CH:11][CH:10]=1.CN(C)C=O.Cl.CN(C)CCCN=C=NCC>N1C=CC=CC=1>[Br:1][C:2]1[CH:8]=[CH:7][CH:6]=[CH:5][C:3]=1[NH:4][C:40](=[O:41])[CH2:39][CH:27]1[CH2:28][N:29]([C:32]([O:34][C:35]([CH3:38])([CH3:37])[CH3:36])=[O:33])[CH2:30][CH2:31][N:26]1[C:24]([O:23][CH2:22][CH:20]1[C:21]2[CH:9]=[CH:10][CH:11]=[CH:12][C:13]=2[C:14]2[C:19]1=[CH:18][CH:17]=[CH:16][CH:15]=2)=[O:25]

Komponenten

6

Edukt 4

HCID 6228DimethylformamideHCID 119922-BromoanilineHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 27567961-Fmoc-4-Boc-Piperazine-2-acetic acid

Produkt 1

HCID 582849301-(9H-fluoren-9-yl)methyl 4-tert-butyl 2-(2-(2-bromophenylamino)-2-oxoethyl)piperazine-1,4-dicarboxylate

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 1049PyridineLösungsmittel

Versuchsvorschrift

To a solution of 2-bromoaniline (3.69 g, 21.44 mmol), and 2-(1-(((9H-fluoren-9-yl)methoxy)carbonyl)-4-(tert-butoxycarbonyl)piperazin-2-yl)acetic acid (10 g, 21.44 mmol) in a 1:1 solution of N,N-dimethylformamide:pyridine (100 mL) was added N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (10.27 g, 53.6 mmol). The reaction mixture was stirred at ambient temperature for 16 hours. The reaction mixture was partitioned between water and ethyl acetate. The organic layer was separated and was subsequently washed with brine (3×) and 1M HCl (3×). The organic solution was then concentrated onto silica gel and purified via flash chromatography (10-70% ethyl acetate/hexanes) to afford the title compound. 1H NMR (400 MHz, DMSO-d6) δ ppm 9.43 (s, 1H), 7.81-7.95 (m, J=7.67 Hz, 2H), 7.53-7.75 (m, 4H), 7.22-7.48 (m, 5H), 7.10 (dd, J=7.21 Hz, 1H), 4.56 (s, 1H), 4.17-4.42 (m, 3H), 3.61-3.98 (m, 3H), 2.89-3.18 (m, 2H), 2.62-2.88 (m, 2H), 2.49-2.58 (m, 1H), 1.32-1.50 (m, 9H); MS (APCI+) m/z 522.2 (M-Boc+H)+.

Aufarbeitung

  1. customThe reaction mixture was partitioned between water and ethyl acetate
  2. customThe organic layer was separated
  3. washwas subsequently washed with brine (3×) and 1M HCl (3×)
  4. concentrationThe organic solution was then concentrated onto silica gel
  5. custompurified via flash chromatography (10-70% ethyl acetate/hexanes)

Quellen und Nachweise

ORD-Eintrag
ord-4d002e6cd6ac470693aaf7f623afb94f
Quelldatensatz
uspto-grants-2014_09
Patentnummer
US08846663B2

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