Reacción #5789

Ecuación de reacción

hydrogen

water

(±)-cis-6-(cyanomethyl)-2,2-dimethyl-1,3-dioxane-4-acetic acid

ammonia

→

(±)-cis-6-(2-aminoethyl)-2,2-dimethyl-1,3-dioxane-4-acetic acid

Rendimiento 52.8%

Disolventes

methanol

Condiciones de reacción

Tratamiento posterior

1. 1
   TemperaturaThe suspension is cooled
2. 2
   Filtraciónfiltered
3. 3
   Otroto remove the Raney nickel
4. 4
   Filtraciónthrough filter aid
5. 5
   Lavadothe precipitate washed with methanol
6. 6
   ConcentraciónThe filtrate is concentrated at reduced pressure
7. 7
   workup.DISSOLUTIONThe residue is dissolved in methanol saturated with anhydrous ammonia
8. 8
   workup.ADDITIONtreated with decolorizing charcoal
9. 9
   Filtraciónfiltered
10. 10
    Filtraciónthrough filter aid
11. 11
    Otroevaporated

Procedimiento

A solution of 1.04 g (4.88 mmol) of (±)-cis-6-(cyanomethyl)-2,2-dimethyl-1,3-dioxane-4-acetic acid in 100 mL of methanol saturated with anhydrous ammonia is added to a Parr shaker bottle containing 0.53 g of water wet Raney nickel #30. The solution is heated at 45° C. and 50 psig hydrogen pressure for 17 hours. The suspension is cooled and filtered to remove the Raney nickel through filter aid and the precipitate washed with methanol. The filtrate is concentrated at reduced pressure. The residue is dissolved in methanol saturated with anhydrous ammonia treated with decolorizing charcoal, filtered through filter aid and evaporated to give 0.56 g of (±)-cis-6-(2-aminoethyl)-2,2-dimethyl-1,3-dioxane-4-acetic acid, mp 165° with decomposition at 169° C.

Fuente