tert-Butyl acrylate → (E)-tert-Butyl 3-(2-(2-ethoxy-2-oxoethyl)phenyl)acrylate

HRID 84955

Reaktionsgleichung

Br[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[CH2:8][C:9]([O:11][CH2:12][CH3:13])=[O:10].[C:14]([O:18][C:19]([CH3:22])([CH3:21])[CH3:20])(=[O:17])[CH:15]=[CH2:16].C1(C(N)C2CCCCC2)CCCCC1.C(P(C(C)(C)C)C(C)(C)C)(C)(C)C>O1CCOCC1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd].C(OCC)(=O)C>[CH2:12]([O:11][C:9](=[O:10])[CH2:8][C:3]1[CH:4]=[CH:5][CH:6]=[CH:7][C:2]=1/[CH:16]=[CH:15]/[C:14]([O:18][C:19]([CH3:22])([CH3:21])[CH3:20])=[O:17])[CH3:13]

Komponenten

Reaktionsbedingungen

Temperatur: 70 °C

Versuchsvorschrift

To a mixture of ethyl 2-(2-bromophenyl)acetate (0.97 g, 4 mmol), t-butyl acrylate (0.51 g, 4 mmol), tris(dibenzylideneacetone)dipalladium(0) (91 mg, 0.1 mmol), dicyclohexylmethylamine (0.98 g, 5 mmol) in dioxane (5 mL) was added tri-tert-butylphosphine (0.2 mL, 1 N in toluene, 0.2 mmol). The mixture was heated at 70° C. for 30 minutes under N2. Ethyl acetate was added, and the mixture was filtered through diatomaceous earth. The filtrate was concentrated and purified by silica gel column chromatography eluting with hexanes and ethyl acetate (10:1) to afford the title compound. 1H NMR (300 MHz, DMSO-d6) δ ppm 7.79 (m, 1H), 7.72 (d, J=15.6 Hz, 1H), 7.34 (m, 3H), 6.40 (d, J=15.7 Hz, 1H), 4.06 (q, J=7.2 Hz, 2H), 3.84 (s, 2H), 1.48 (s, 9H), and 1.17 (t, J=2 Hz, 3H).

Aufarbeitung

filtrationthe mixture was filtered through diatomaceous earth
concentrationThe filtrate was concentrated
custompurified by silica gel column chromatography
washeluting with hexanes and ethyl acetate (10:1)

Quellen und Nachweise

ORD-Eintrag: ord-02bb524d6400491e80253008d44c0ca7
Quelldatensatz: uspto-grants-2014_09
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US08846951B2

Verknüpfte Notizen

Wird geladen…