Reaktion #321932

Reaktionsgleichung

5-hydroxytricyclo[3.3.1.13,7 ]decan-2-one

4-(benzoxazol-2-yl)benzyl bromide

MeOH

→

5-[4-(benzoxazol-2-yl)benzyloxy]tricyclo[3.3.1.13,7 ]decan-2-one

Lösungsmittel

THF

THF

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigeat room temperature
2. 2
   workup.STIRRINGA bright yellow mixture forms and the mixture is stirred overnight at room temperature
3. 3
   TemperaturThe mixture is next cooled in an ice bath
4. 4
   Sonstigeto quench any KH
5. 5
   Filtrationfiltered
6. 6
   WaschenThe filtercake is washed with THF
7. 7
   Sonstigeevaporated to dryness
8. 8
   SonstigeThe product is purified
9. 9
   Waschena gradient flash chromatography (eluting with 10%-25% ethyl acetate/hexane)

Vorschrift

To KH (35%; 1.38 g; 0.012 mole) in THF (20 ml) under N2 and cooled to 0° C. is added 5-hydroxytricyclo[3.3.1.13,7 ]decan-2-one (2 g; 0.012 mole) all at once. The reaction mixture is stirred for 5 min. in an ice bath and 1 hr. at room temperature. To the reaction mixture is then added 4-(benzoxazol-2-yl)benzyl bromide (3.4 g; 0.012 mole) dissolved in THF (60 ml) at a fast drip rate. A bright yellow mixture forms and the mixture is stirred overnight at room temperature. The mixture is next cooled in an ice bath, MeOH added to quench any KH and filtered. The filtercake is washed with THF and evaporated to dryness. The product is purified using a gradient flash chromatography (eluting with 10%-25% ethyl acetate/hexane) to obtain 5-[4-(benzoxazol-2-yl)benzyloxy]tricyclo[3.3.1.13,7 ]decan-2-one (m.p. 159°-160° C.) which is used directly in Step C.

Quelle