Reaktion #87494

Reaktionsgleichung

(1S,2S,3S,4R,5S)-5-(3-(4-(2-(Benzyloxy)ethoxy)benzyl)-4-chlorophenyl)-1-(hydroxymethyl)-6,8-dioxabicyclo[3.2.1]octane-2,3,4-triol

formic acid

→

desired product

Ausbeute 82.0%

(1S,2S,3S,4R,5S)-5-{4-Chloro-3-[4-(2-hydroxy-ethoxy)-benzyl]-phenyl}-1-hydroxymethyl-6,8-dioxa-bicyclo[3.2.1]octane-2,3,4-triol

Ausbeute 82.0%

Lösungsmittel

ethanol

tetrahydrofurane

Reaktionsbedingungen

Aufarbeitung

1. 1
   Filtrationthe palladium was filtered through a pad of Celite®
2. 2
   Sonstigethe filtrate was evaporated
3. 3
   Sonstigethe residue was dried under high vacuum

Vorschrift

To a solution of intermediate (1S,2S,3S,4R,5S)-5-(3-(4-(2-(Benzyloxy)ethoxy)benzyl)-4-chlorophenyl)-1-(hydroxymethyl)-6,8-dioxabicyclo[3.2.1]octane-2,3,4-triol (4 mg, 0.007 mmol) in a mixture of ethanol and tetrahydrofurane (1 mL, 4 to 1 in volume) was successively added formic acid (12 microL, 0.30 mmol) and palladium black (7.5 mg, 0.07 mmol). The reaction mixture was stirred at room temperature for 2 hours, the palladium was filtered through a pad of Celite®, the filtrate was evaporated and the residue was dried under high vacuum to afford 2.6 mg (80% yield) of the desired product. LCMS 453.5 (M+H+; positive mode). 1H NMR (500 MHz, METHANOL-d4) delta ppm 3.56 (d, J=7.8 Hz, 1 H), 3.58-3.72 (m, 4 H), 3.79 (d, J=7.8 Hz, 1 H), 3.82-3.88 (m, 2 H), 4.02 (t, J=4.9 Hz, 2 H), 4.05 (s, 2 H), 4.16 (d, J=7.6 Hz, 1 H), 6.84-6.89 (m, 2H), 7.11 (d, J=8.5 Hz, 2 H), 7.35-7.42 (m, 2 H), 7.47 (d, J=2.0 Hz, 1 H).

Quelle