Borane → 1,2-Benzenediethanol

(2-Carboxymethyl-phenyl)-acetic acid (5.0 g/25 mmol) was dissolved in THF (100 mL) and cooled to 0° C. Borane (1 M in THF, 100 mL/100 mmol) was then added dropwise while stirring (hydrogen evolution). The reaction was left to stir a 0° C. for four hours then carefully quenched by the addition of water (ca. 20 mL). The reaction was partitioned between diethyl ether (200 mL) and water (200 mL). The organic layer was extracted with an additional portion of ether (100 mL) and the combined organics washed with brine (100 mL), dried over magnesium sulfate, filtered and concentrated. To give 2-[2-(2-Hydroxy-ethyl)-phenyl]-ethanol (3.3 g/80%). 1H NMR (400 MHz, CDCl3) δ 7.2 (m, 4H), 3.9 (t, J=6.8 Hz, 4H), 2.95 (t, J=6.8 Hz, 4H).

1. waitThe reaction was left
2. customthen carefully quenched by the addition of water (ca. 20 mL)
3. customThe reaction was partitioned between diethyl ether (200 mL) and water (200 mL)
4. extractionThe organic layer was extracted with an additional portion of ether (100 mL)
5. washthe combined organics washed with brine (100 mL)
6. dry with materialdried over magnesium sulfate
7. filtrationfiltered
8. concentrationconcentrated

ORD-Eintrag

ord-604b80242ce9483eb4f28f9703eee3fa

Quelldatensatz

uspto-grants-2012_04

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08148391B2