Reaktion #159762

Reaktionsgleichung

(2S,3R,4S,5S,6R)-2-{4-chloro-3-[1-(4-methoxy-benzyl)-1,2,3,4-tetrahydro-quinolin-6-ylmethyl]-phenyl}-6-hydroxymethyl-2-methoxy-tetrahydro-pyran-3,4,5-triol

triethylsilane

boron trifluoride

→

(2S,3R,4R,5S,6R)-2-{4-chloro-3-[1-(4-methoxy-benzyl)-1,2,3,4-tetrahydro-quinolin-6-ylmethyl]-phenyl}-6-hydroxymethyl-tetrahydro-pyran-3,4,5-triol

Ausbeute 49.4%

Lösungsmittel

acetonitrile dichloromethane

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigereaction
2. 2
   Sonstigewas quenched with aq. saturated NaHCO3 solution (8 mL)
3. 3
   SonstigeThe volatiles were evaporated under reduced pressure
4. 4
   Extraktionthe resulting mixture was extracted with ethyl acetate (3×20 mL)
5. 5
   WaschenThe organic layer was washed with brine (5 mL)
6. 6
   Trocknendried over sodium sulphate
7. 7
   Einengenconcentrated
8. 8
   Sonstigepurified by preparative HPLC

Vorschrift

To a stirred solution of (2S,3R,4S,5S,6R)-2-{4-chloro-3-[1-(4-methoxy-benzyl)-1,2,3,4-tetrahydro-quinolin-6-ylmethyl]-phenyl}-6-hydroxymethyl-2-methoxy-tetrahydro-pyran-3,4,5-triol (325 mg, 0.6 mmol) in acetonitrile-dichloromethane mixture (1:1 mixture, 14 mL) was added triethylsilane (0.4 mL, 2.2 mmol) and boron trifluoride diethyletharate complex (0.15 mL, 1.1 mmol) at −20° C. After stirring for 4 h at 0° C., reaction was quenched with aq. saturated NaHCO3 solution (8 mL). The volatiles were evaporated under reduced pressure; the resulting mixture was extracted with ethyl acetate (3×20 mL). The organic layer was washed with brine (5 mL), dried over sodium sulphate, concentrated and purified by preparative HPLC to furnish (2S,3R,4R,5S,6R)-2-{4-chloro-3-[1-(4-methoxy-benzyl)-1,2,3,4-tetrahydro-quinolin-6-ylmethyl]-phenyl}-6-hydroxymethyl-tetrahydro-pyran-3,4,5-triol (160 mg).

Quelle