Reaktion #308765

Reaktionsgleichung

(2R,3R)-3-(benzyloxy)-2-(tritylamino)butan-1-ol

triethylamine

tert-butyldimethylsilyl chloride

→

(2R,3R)-3-(benzyloxy)-1-{[tert-butyl(dimethyl)silyl]oxy-}-N-tritylbutan-2-amine

Ausbeute 59.6%

Lösungsmittel

CH2Cl2

Reaktionsbedingungen

Aufarbeitung

1. 1
   EinengenThe reaction mixture was then concentrated
2. 2
   workup.DISSOLUTIONthe resulting material was dissolved in 50 mL of CH2Cl2
3. 3
   Waschenwashed successively with H2O and brine
4. 4
   TrocknenThe organic portion was then dried over Na2SO4
5. 5
   Filtrationfiltered
6. 6
   Einengenconcentrated under reduced pressure

Vorschrift

A solution of (2R,3R)-3-(benzyloxy)-2-(tritylamino)butan-1-ol (4.33 g, 9.91 mmol) dissolved in 150 mL of CH2Cl2 was treated with triethylamine (1.52 mL, 10.9 mmol), tert-butyldimethylsilyl chloride (1.65 g, 10.9 mmol) and DMAP (122 mg, 1.00 mmol) and the reaction mixture was stirred under N2 overnight. The reaction mixture was then concentrated and the resulting material was dissolved in 50 mL of CH2Cl2 and washed successively with H2O and brine. The organic portion was then dried over Na2SO4, filtered and concentrated under reduced pressure. Chromatography (SiO2, 5-10% ethyl acetate/hexanes) gave 3.26 g of (2R,3R)-3-(benzyloxy)-1-{[tert-butyl(dimethyl)silyl]oxy-}-N-tritylbutan-2-amine as a white solid.

Quelle