(R)-(-)-2-Amino-1-propanol → 5-[3-(4-Chloro-phenyl)-isoxazol-4-ylmethoxy]-pyrazine-2-carboxylic acid ((S)-2-hydroxy-1-methyl-ethyl)-amide

HRID 600499Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 600499
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[C:12]([CH2:13][O:14][C:15]3[N:16]=[CH:17][C:18]([C:21]([OH:23])=O)=[N:19][CH:20]=3)=[CH:11][O:10][N:9]=2)=[CH:4][CH:3]=1.[NH2:24][C@@H:25]([CH2:27][OH:28])[CH3:26].O.ON1C2C=CC=CC=2N=N1.C(N(C(C)C)C(C)C)C.Cl.CN(C)CCCN=C=NCC>C1COCC1.O>[OH:28][CH2:27][C@@H:25]([NH:24][C:21]([C:18]1[CH:17]=[N:16][C:15]([O:14][CH2:13][C:12]2[C:8]([C:5]3[CH:4]=[CH:3][C:2]([Cl:1])=[CH:7][CH:6]=3)=[N:9][O:10][CH:11]=2)=[CH:20][N:19]=1)=[O:23])[CH3:26]

Komponenten

8

Edukt 5

HCID 80308(R)-(-)-2-Amino-1-propanolHCID 81531DiisopropylethylamineHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 27960291-Hydroxybenzotriazole hydrateHCID 684440725-[3-(4-Chloro-phenyl)-isoxazol-4-ylmethoxy]-pyrazine-2-carboxylic acid

Produkt 1

HCID 469379035-[3-(4-Chloro-phenyl)-isoxazol-4-ylmethoxy]-pyrazine-2-carboxylic acid ((S)-2-hydroxy-1-methyl-ethyl)-amideAusbeute 42 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

To a solution of 5-[3-(4-chloro-phenyl)-isoxazol-4-ylmethoxy]-pyrazine-2-carboxylic acid (80 mg, 0.24 mmol) and D-alaninol (22.8 □L, 0.29 mmol) in THF (7 mL) was added 1-hydroxybenzotriazole hydrate (37.3 mg, 0.24 mmol), N-ethyldiisopropylamine (105.2 □L, 0.60 mmol) and N-(3-dimethylaminopropyl)-N′-ethylcarbodiimide hydrochloride (47.1 mg, 0.24 mmol) at room temperature under nitrogen. The reaction mixture was stirred at room temperature for 72 h. Then the reaction mixture was diluted with water (10 mL), and extracted with ethyl acetate. The combined organic layers were then washed with water and brine, dried over sodium sulfate and evaporated. Purification by chromatography (SiO2, heptane:ethyl acetate=1:1 to 2:3) afforded the title product (39 mg, 42%) which was obtained as white solid. MS: m/e=389.0 [M+H]+.

Aufarbeitung

  1. extractionextracted with ethyl acetate
  2. washThe combined organic layers were then washed with water and brine
  3. dry with materialdried over sodium sulfate
  4. customevaporated
  5. customPurification by chromatography (SiO2, heptane:ethyl acetate=1:1 to 2:3)

Quellen und Nachweise

ORD-Eintrag
ord-33d878a95fb647a485567de844601b1f
Quelldatensatz
uspto-grants-2011_03
Patentnummer
US07902201B2

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