Reacción #435074

Ecuación de reacción

sodium bicarbonate

cis-1-{2-[4-(6-methoxy-2-phenyl 1,2,3,4-tetrahydronaphthalen-1-yl)phenoxy]ethyl}pyrrolidine

boron tribromide

→

lasofoxifene

Rendimiento 74.0%

Disolventes

methylene chloride

methylene chloride

Condiciones de reacción

Tratamiento posterior

1. 1
   OtroThe organic layer was separated
2. 2
   Secadodried over sodium sulfate
3. 3
   Filtraciónfiltered
4. 4
   Concentraciónconcentrated

Procedimiento

To a solution of 400 mg (0.94 mmol) of cis-1-{2-[4-(6-methoxy-2-phenyl 1,2,3,4-tetrahydronaphthalen-1-yl)phenoxy]ethyl}pyrrolidine in 25 mL of methylene chloride at 0° C. was added, dropwise with stirring, 4.7 ml (4.7 mmol) of a 1.0 M solution of boron tribromide in methylene chloride. After 3 hours at room temperature, the reaction was poured into 100 mL of rapidly stirring saturated aqueous sodium bicarbonate. The organic layer was separated, dried over sodium sulfate, filtered, and concentrated to afford 287 mg (74% yield) of lasofoxifene as the free base.

Fuente