Réaction #1291

Équation de réaction

Potassium bromide

D-norleucine

sodium nitrite

→

crude title product

(S)-2-Bromohexanoic acid

Solvants

sulfuric acid

Conditions de réaction

Traitement

1. 1
   Températuremaintaining the temperature between -10° and -5° C
2. 2
   workup.ADDITIONAfter addition
3. 3
   Autrethe foamy reaction
4. 4
   Températurewarmed to room temperature
5. 5
   workup.STIRRINGstirred for another hour
6. 6
   ExtractionThe reaction mixture was then extracted twice with ether
7. 7
   Lavagethe ether extracts were washed once with water
8. 8
   Séchagedried (magnesium sulfate)
9. 9
   Filtrationfiltered
10. 10
    Autreevaporated
11. 11
    Autreto give 3.3 g

Mode opératoire

Potassium bromide (15.9 g., .133 mmol.) was added to a stirred solution of D-norleucine (5.0 g., 38 mmol.) in 2.5N sulfuric acid (77 ml.) at room temperature. The reaction mixture was cooled to -10° C. and solid sodium nitrite (3.94 g., 57 mmol.) was added portionwise, maintaining the temperature between -10° and -5° C. After addition was complete, the foamy reaction was stirred for 1 hour and then warmed to room temperature and stirred for another hour. The reaction mixture was then extracted twice with ether, the ether extracts were washed once with water, dried (magnesium sulfate), filtered and evaporated to give 3.3 g. of crude title product.

Source