Cyclopropylboronic acid → 8-Benzyl-3-cyclopropyl-6,7,8,9-tetrahydropyrazino[2,3-f][1,4]oxazepine
Reaktionsgleichung
[CH2:1]([N:8]1[CH2:14][C:13]2[N:15]=[CH:16][C:17](Cl)=[N:18][C:12]=2[O:11][CH2:10][CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[CH:20]1(B(O)O)[CH2:22][CH2:21]1.C1(P(C2CC2)C2CC2)CC1.CC(C)([O-])C.[K+]>C1(C)C=CC=CC=1.C([O-])(=O)C.[Pd+2].C([O-])(=O)C.O>[CH2:1]([N:8]1[CH2:14][C:13]2[N:15]=[CH:16][C:17]([CH:20]3[CH2:22][CH2:21]3)=[N:18][C:12]=2[O:11][CH2:10][CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1Komponenten
8
Edukt 4
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 3
Reaktionsbedingungen
- Temperatur
- 100 °C
Versuchsvorschrift
A suspension of 8-benzyl-3-chloro-6,7,8,9-tetrahydropyrazino[2,3-f][1,4]oxazepine (493 mg), cyclopropylboronic acid (280 mg), palladium acetate (20 mg), tricyclopropylphosphine (51 mg) and potassium tert-butoxide (663 mg) in toluene (8 mL) was stirred under an argon atmosphere with heating at 100° C. for 2 hr. Water was added to the reaction mixture, the aqueous layer was extracted with ethyl acetate, and the organic layer was washed with saturated brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The obtained residue was purified by silica gel column chromatography (solvent gradient: 5→25% ethyl acetate/hexane) to give the title compound (79.9 mg, 16%) as a colorless oil.
Aufarbeitung
- extractionthe aqueous layer was extracted with ethyl acetate
- washthe organic layer was washed with saturated brine
- dry with materialdried over anhydrous magnesium sulfate
- concentrationconcentrated under reduced pressure
- customThe obtained residue was purified by silica gel column chromatography (solvent gradient: 5→25% ethyl acetate/hexane)
Quellen und Nachweise
- ORD-Eintrag
- ord-dca4c820242f4e6dae68e130c732b7ba
- Quelldatensatz
- uspto-grants-2012_12
- Patentnummer
- US08324201B2
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