Reaktion #66057

Reaktionsgleichung

racemic 2,6 diamino-4,5,6,7-tetrahydro-benzothiazole

propyl tosylate

→

Pramipexole P-TSA

Lösungsmittel

n-propanol

n-propanol

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeA 250 ml, three necked flask was equipped with a magnetic stirrer
2. 2
   workup.ADDITIONa temperature probe, a heating mantle, a claisen joint, a reflux condenser, and a 100 ml addition funnel
3. 3
   workup.ADDITIONThis solution was added dropwise to the 250 ml flask
4. 4
   workup.STIRRINGwith stirring for an additional 6 hours at 95° C.
5. 5
   Sonstigewas brought to room temperature
6. 6
   workup.STIRRINGstirring
7. 7
   workup.WAITwas continued for an additional 6 hours

Vorschrift

A 250 ml, three necked flask was equipped with a magnetic stirrer, a temperature probe, a heating mantle, a claisen joint, a reflux condenser, and a 100 ml addition funnel. The flask was charged with 5 grams of racemic 2,6 diamino-4,5,6,7-tetrahydro-benzothiazole, followed by 80 ml of n-propanol. Under continuous stirring, the mixture was heated to a temperature of 95° C. over 15 minutes generating a clear solution. The addition funnel was charged with a solution of 10.12 grams propyl tosylate and 9.2 ml diisopropylethyleamine in 28 ml n-propanol. This solution was added dropwise to the 250 ml flask with continuous stirring over a period of 2 hours. The reaction was continued with stirring for an additional 6 hours at 95° C., after which the solution was brought to room temperature, and stirring was continued for an additional 6 hours.

Quelle