Phenylboronic Acid → (R)-2'-bromo-7'-phenyl-5H-spiro[oxazole-4,9'-xanthen]-2-amine

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Reaktionsgleichung

[Br:1][C:2]1[CH:15]=[CH:14][C:13]2[O:12][C:11]3[C:6](=[CH:7][C:8](I)=[CH:9][CH:10]=3)[C@:5]3([CH2:20][O:19][C:18]([NH2:21])=[N:17]3)[C:4]=2[CH:3]=1.[C:22]1(B(O)O)[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1>O1CCOCC1.O.C(OCC)(=O)C.CC(P(C(C)(C)C)C1C=CC(N(C)C)=CC=1)(C)C.CC(P(C(C)(C)C)C1C=CC(N(C)C)=CC=1)(C)C.Cl[Pd]Cl>[Br:1][C:2]1[CH:15]=[CH:14][C:13]2[O:12][C:11]3[C:6](=[CH:7][C:8]([C:22]4[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=4)=[CH:9][CH:10]=3)[C@:5]3([CH2:20][O:19][C:18]([NH2:21])=[N:17]3)[C:4]=2[CH:3]=1

Komponenten

Reaktionsbedingungen

Temperatur: 100 °C

Versuchsvorschrift

A 100 ml RBF vial was charged with (S)-2′-bromo-7′-iodo-5H-spiro[oxazole-4,9′-xanthen]-2-amine (3.37 g, 7.37 mmol) in dioxane (30 mL), water (15 mL), phenylboronic acid (0.965 g, 7.91 mmol), bis(di-tert-butyl(4-dimethylaminophenyl)phosphine)dichloropalladium(II) (0.106 g, 0.150 mmol), and potassium phosphate-tribasic (3.17 g, 14.93 mmol). The reaction was heated to 100° C. in an oil-bath for 8 hours. The reaction was diluted with ethyl acetate (100 mL), water (25 mL), and the ethyl acetate layer was separated and dried over anhydrous sodium sulfate. Concentration and purification by silica gel flash column chromatography (hexanes/ethyl acetate) provided (R)-2′-bromo-7′-phenyl-5H-spiro[oxazole-4,9′-xanthen]-2-amine.

Aufarbeitung

customthe ethyl acetate layer was separated
dry with materialdried over anhydrous sodium sulfate
concentrationConcentration and purification by silica gel flash column chromatography (hexanes/ethyl acetate)

Quellen und Nachweise

ORD-Eintrag: ord-79df6c99ca324b1fbece64fa74fb372e
Quelldatensatz: uspto-grants-2013_04
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US08426447B2

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