Ethyl Acetate → 2-Propenoic acid, 3-(4-iodophenyl)-, ethyl ester
Reaktionsgleichung
C([Li])CCC.[I:6][C:7]1[CH:14]=[CH:13][C:10]([CH:11]=O)=[CH:9][CH:8]=1.[C:15]([O:18][CH2:19][CH3:20])(=[O:17])[CH3:16]>O1CCCC1.CCCCCC>[CH2:19]([O:18][C:15](=[O:17])[CH:16]=[CH:11][C:10]1[CH:13]=[CH:14][C:7]([I:6])=[CH:8][CH:9]=1)[CH3:20]Komponenten
Edukt 3
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 2
Reaktionsbedingungen
- Temperatur
- 0 °C
Versuchsvorschrift
A stirred, cooled (−78° C.) solution of triethylphosphonoacetate (11.1 mL, 56 mmol) in anhydrous tetrahydrofuran (100 mL) was treated with a 1.6M solution of n-butyl lithium in hexanes (27 mL, 43.75 mmol). After 10 min, the reaction mixture was cannulated into a cooled (−78° C.) solution of 4-iodo-benzaldehyde (6.5 g, 28 mmol) in tetrahydrofuran (20 mL). The reaction mixture was allowed to warm to 0° C. over 1 h. It was quenched with saturated aqueous ammonium chloride solution and extracted with diethyl ether (×2). The combined organic phase was dried over anhydrous magnesium sulfate, filtered and evaporated in vacuo to afford an oil that was subjected to flash column chromatography over silica gel (230–400 mesh) using 6–8% ethyl acetate in hexane as the eluent to afford the title compound (2.7 g pure, 3.2 g˜95% pure, 69%).
Aufarbeitung
- customIt was quenched with saturated aqueous ammonium chloride solution
- extractionextracted with diethyl ether (×2)
- dry with materialThe combined organic phase was dried over anhydrous magnesium sulfate
- filtrationfiltered
- customevaporated in vacuo
- customto afford an oil that
Quellen und Nachweise
- ORD-Eintrag
- ord-1e3653e9259a411f956ae3d2ebd3217c
- Quelldatensatz
- uspto-grants-2007_06
- Patentnummer
- US07226951B2
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