Dimethyl Sulfoxide → trans-2-(4-Bromophenyl)cyclopropane-1-carbaldehyde

Temperatur

-78 °C

To a solution of oxalyl chloride (17.50 mL, 2 M in DCM, 35.0 mmol) in DCM (150 mL) under nitrogen atmosphere and cooled to −78° C. was added drop wise DMSO (4.97 mL, 70.0 mmol), followed with the dropwise addition of a solution of the product from Example 34D, ((1S,2S)-2-(4-bromophenyl)cyclopropyl)methanol (5.3 g, 23.34 mmol) in DCM (100 mL). The mixture was stirred 30 minutes at −78° C. Then the mixture was treated with triethylamine (13.01 mL, 93 mmol), and then the reaction temperature was raised to ambient temperature. The mixture was partitioned between DCM (400 mL) and H20 (400 mL). The organic layer was separated, washed with water, dried and concentrated under reduced pressure to provide the title product. 1H NMR (300 MHz, CDCl3): δ 1.48 (m, 1H), 1.65 (dt, J=9 Hz, J=6 Hz, 1H), 2.15 (m, 1H), 2.57 (m, 1H), 6.98 (d, J=9 Hz, 2H), 7.45 (d, J=9 Hz, 2H), 9.46 (d, J=4.5 Hz, 1H). MS (DCl—NH3) m/z 226 (M+H)+.

1. temperaturethe reaction temperature was raised to ambient temperature
2. customThe mixture was partitioned between DCM (400 mL) and H20 (400 mL)
3. customThe organic layer was separated
4. washwashed with water
5. customdried
6. concentrationconcentrated under reduced pressure

ORD-Eintrag

ord-4863456af0bf43b3b884a322ad26b70e

Quelldatensatz

uspto-grants-2014_09

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08829041B2