Reaktion #220298

Reaktionsgleichung

(R)-propylene carbonate

Adenine

Magnesium t-Butoxide

methanesulfonic acid

adenine

PMPA

→

(R)-9-[2-(hydroxy)propyl]adenine

Ausbeute 75.0%

Lösungsmittel

toluene

DMF

toluene

Reaktionsbedingungen

Aufarbeitung

1. 1
   TemperaturThe reaction was cooled to 100° C.
2. 2
   Temperaturwhile maintaining the reaction temperature between 100-110° C
3. 3
   TemperaturThe solution was cooled to 3° C. over 7 hours
4. 4
   SonstigeThe resulting solid was isolated by filtration
5. 5
   Waschenrinsed with acetone (2×)
6. 6
   SonstigeThe wet solid was dried in vacuo at 80° C.

Vorschrift

Adenine to PMPA using Magnesium t-Butoxide. To a suspension of adenine (40 g, 0.296 mol) in DMF (41.9 ml) was added (R)-propylene carbonate (34.5 g, 0.338 mol) and sodium hydroxide (0.480 g, 0.012 mol). The mixture was heated at 130° C. overnight. The reaction was cooled to 100° C. and toluene (138 ml) was added followed by methanesulfonic acid (4.7 g, 0.049 mol) while maintaining the reaction temperature between 100-110° C. Additional toluene (114 ml) was added to create a homogeneous solution. The solution was cooled to 3° C. over 7 hours and then held at 3° C. for one hour. The resulting solid was isolated by filtration and rinsed with acetone (2×). The wet solid was dried in vacuo at 80° C. to yield 42.6 g (75%) of (R)-9-[2-(hydroxy)propyl]adenine (HPA) as an off-white solid. Mp: 188-190° C.

Quelle