2-Bromostyrene → Benzaldehyde, 2-ethenyl-

Temperatur

-65 °C

To a solution of 2-bromostyrene (115 mmol) in dry tetrahydrofuran (200 ml) at -65° C. under nitrogen was added dropwise n-butyllithium (115 mmol) in hexane. The reaction mixture was stirred at -65° C. for an additional hour and a solution of N-formylpiperidine (125 mmol) in tetrahydrofuran (50 ml) was added dropwise. The reaction mixture was allowed to warm to ambient temperature overnight. The reaction mixture was cooled to 0° C. and then quenched with saturated ammonium chloride (50 ml). The reaction mixture was extracted with diethyl ether (2×50 ml) and the combined organic phases were washed with 3N hydrochloric acid (2×50 ml), saturated aqueous sodium bicarbonate (50 ml), and brine, dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated in vacuo to yield the Compound 2a which was directly used in the next reaction.

1. temperatureto warm to ambient temperature overnight
2. temperatureThe reaction mixture was cooled to 0° C.
3. customquenched with saturated ammonium chloride (50 ml)
4. extractionThe reaction mixture was extracted with diethyl ether (2×50 ml)
5. washthe combined organic phases were washed with 3N hydrochloric acid (2×50 ml), saturated aqueous sodium bicarbonate (50 ml), and brine
6. dry with materialdried over anhydrous sodium sulfate
7. filtrationfiltered
8. concentrationThe filtrate was concentrated in vacuo

ORD-Eintrag

ord-c1c226ff46244816b56974bf4ddc5953

Quelldatensatz

uspto-grants-1986_05

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US04587253