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4-Methylmorpholine → Tert-butyl 3-(2-hydroxy-2-(4-(5-(3-phenyl-4-(trifluoromethyl)isoxazol-5-yl)-1,2,4-oxadiazol-3-yl)phenyl)acetamido)azetidine-1-carboxylate

HRID 77151
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Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 77151
[OH:1][CH:2]([C:6]1[CH:11]=[CH:10][C:9]([C:12]2[N:16]=[C:15]([C:17]3[O:21][N:20]=[C:19]([C:22]4[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=4)[C:18]=3[C:28]([F:31])([F:30])[F:29])[O:14][N:13]=2)=[CH:8][CH:7]=1)[C:3]([OH:5])=O.CN1CCOCC1.[C:39]([O:43][C:44]([N:46]1[CH2:49][CH:48]([NH2:50])[CH2:47]1)=[O:45])([CH3:42])([CH3:41])[CH3:40].F[P-](F)(F)(F)(F)F.N1(O[P+](N(C)C)(N(C)C)N(C)C)C2C=CC=CC=2N=N1>CN(C=O)C.CCOC(C)=O>[OH:1][CH:2]([C:6]1[CH:11]=[CH:10][C:9]([C:12]2[N:16]=[C:15]([C:17]3[O:21][N:20]=[C:19]([C:22]4[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=4)[C:18]=3[C:28]([F:30])([F:29])[F:31])[O:14][N:13]=2)=[CH:8][CH:7]=1)[C:3]([NH:50][CH:48]1[CH2:47][N:46]([C:44]([O:43][C:39]([CH3:42])([CH3:41])[CH3:40])=[O:45])[CH2:49]1)=[O:5]
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Komponenten

7

Edukt 4

HCID 79724-MethylmorpholineHCID 151348Benzotriazol-1-yloxy-tris(dimethylamino)phosphonium hexafluorophosphateHCID 1516507Tert-butyl 3-aminoazetidine-1-carboxylateHCID 674589572-Hydroxy-2-(4-(5-(3-phenyl-4-(trifluoromethyl)isoxazol-5-yl)-1,2,4-oxadiazol-3-yl)phenyl)acetic acid

Produkt 1

HCID 67460528
Tert-butyl 3-(2-hydroxy-2-(4-(5-(3-phenyl-4-(trifluoromethyl)isoxazol-5-yl)-1,2,4-oxadiazol-3-yl)phenyl)acetamido)azetidine-1-carboxylate
Ausbeute 99 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 6228DimethylformamideLösungsmittelHCID 8857Ethyl AcetateLösungsmittel

Versuchsvorschrift

2-Hydroxy-2-(4-(5-(3-phenyl-4-(trifluoromethyl)isoxazol-5-yl)-1,2,4-oxadiazol-3-yl)phenyl)acetic acid (Int-Va, 90 mg, 0.209 mmol) was dissolved in DMF (1 mL) prior to the addition of 4-methylmorpholine (115 μL, 1.043 mmol), 3-amino-azetidine-1-carboxylic acid tert-butyl ester (53.9 mg, 0.313 mmol), and BOP (166 mg, 0.376 mmol). This was stirred overnight before EtOAc was added. The solution was washed with brine, 1N HCl, and sat. NaHCO3 solution. The organic layer was dried and concentrated to give single enantiomer tert-butyl 3-(2-hydroxy-2-(4-(5-(3-phenyl-4-(trifluoromethyl)isoxazol-5-yl)-1,2,4-oxadiazol-3-yl)phenyl)acetamido)azetidine-1-carboxylate (120.6 mg, 0.206 mmol, 99% yield): LCMS=586.4 [M+H]+. A portion of this tert-butyl 3-(2-hydroxy-2-(4-(5-(3-phenyl-4-(trifluoromethyl)isoxazol-5-yl)-1,2,4-oxadiazol-3-yl)phenyl)acetamido)azetidine-1-carboxylate (118 mg, 0.202 mmol) was dissolved in CH2Cl2 (2 mL) and TFA (2 mL). This was stirred for 1 h and then concentrated. The resulting residue was purified by preparative HPLC (PHENOMENEX® Luna 5u C18 21.2×100 mm, gradient elution with Method 1—MeOH/water containing 0.1% trifluoroacetic acid as defined above, 0% B to 100% B% over 10 min, product retention time=10.5 min, 20 mL/min, 220 nM) to give single enantiomer N-(azetidin-3-yl)-2-hydroxy-2-(4-(5-(3-phenyl-4-(trifluoromethyl)isoxazol-5-yl)-1,2,4-oxadiazol-3-yl)phenyl)acetamide-TFA (30 mg, 0.046 mmol, 22.60% yield): LCMS=486.0 [M+H]+; 1H NMR (400 MHz, methanol-d4) δ ppm 8.14-8.25 (2 H, m), 7.65-7.78 (4 H, m), 7.54-7.65 (3 H, m), 5.18 (1 H, s), 4.71 (1 H, t, J=7.81 Hz), 4.16-4.32 (4 H, m). HPLC Peak RT=8.3 min (Analytical Method A).

Aufarbeitung

  1. additionwas added
  2. washThe solution was washed with brine, 1N HCl, and sat. NaHCO3 solution
  3. customThe organic layer was dried
  4. concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag
ord-ebf43549adde4d9fb54eb99b3ee92fb3
Quelldatensatz
uspto-grants-2014_09
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08835470B2

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