Triethylamine → (S)-4-(2-methyl-6-nitro-2,3-dihydroimidazo[2,1-b]oxazol-2-ylmethyl)piperazine-1-carboxylic acid cyclohexylamide

HRID 856329Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 856329
Cl.Cl.[CH3:3][C@@:4]1([CH2:15][N:16]2[CH2:21][CH2:20][NH:19][CH2:18][CH2:17]2)[O:8][C:7]2=[N:9][C:10]([N+:12]([O-:14])=[O:13])=[CH:11][N:6]2[CH2:5]1.C(N(CC)CC)C.[CH:29]1([N:35]=[C:36]=[O:37])[CH2:34][CH2:33][CH2:32][CH2:31][CH2:30]1>C(Cl)Cl>[CH:29]1([NH:35][C:36]([N:19]2[CH2:18][CH2:17][N:16]([CH2:15][C@:4]3([CH3:3])[O:8][C:7]4=[N:9][C:10]([N+:12]([O-:14])=[O:13])=[CH:11][N:6]4[CH2:5]3)[CH2:21][CH2:20]2)=[O:37])[CH2:34][CH2:33][CH2:32][CH2:31][CH2:30]1

Komponenten

5

Edukt 3

HCID 8471TriethylamineHCID 18502Cyclohexyl isocyanateHCID 69481767(S)-2-methyl-6-nitro-2-(piperazin-1-ylmethyl)-2,3-dihydroimidazo[2,1-b]oxazole dihydrochloride

Produkt 1

HCID 69479526(S)-4-(2-methyl-6-nitro-2,3-dihydroimidazo[2,1-b]oxazol-2-ylmethyl)piperazine-1-carboxylic acid cyclohexylamideAusbeute 47,5 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

(S)-2-Methyl-6-nitro-2-(piperazin-1-ylmethyl)-2,3-dihydroimidazo[2,1-b]oxazole dihydrochloride prepared in Example 408 (236 mg, 0.88 mmol) was dissoloved in a mixture of methylene chloride (15 ml) and triethylamine (2 ml, 14.35 mmol). To the solution, cyclohexyl isocyanate (120 mg, 0.96 mmol) was added followed by stirring at room temperature for 1 hour. The reaction mixture was washed with water and a saturated saline solution, dried over sodium sulfate and then filtered. The filtrate was concentrated under reduced pressure, and the residue was purified by silica gel column chromatography (methylene chloride/methanol=20/1) to afford (S)-4-(2-methyl-6-nitro-2,3-dihydroimidazo[2,1-b]oxazol-2-ylmethyl)piperazine-1-carboxylic acid cyclohexylamide (164 mg, 47%) as a light yellow powder.

Aufarbeitung

  1. washThe reaction mixture was washed with water
  2. dry with materiala saturated saline solution, dried over sodium sulfate
  3. filtrationfiltered
  4. concentrationThe filtrate was concentrated under reduced pressure
  5. customthe residue was purified by silica gel column chromatography (methylene chloride/methanol=20/1)

Quellen und Nachweise

ORD-Eintrag
ord-9d75a12a7fde46bb8ba8edf16c529afd
Quelldatensatz
uspto-grants-2007_08
Patentnummer
US07262212B2

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