Reaktion #418055

Reaktionsgleichung

2,4-dichloro-6,7-dihydro-thieno[3,2-d]pyrimidine

diisopropylethylamine

(R)-(−)-2-amino-3-methyl-1-butanol

→

(R)-2-(2-chloro-6,7-dihydro-thieno[3,2-d]pyrimidin-4-ylamino)-3-methyl-butan-1-ol

Lösungsmittel

dioxane

Reaktionsbedingungen

Aufarbeitung

1. 1
   Sonstigeno further reaction
2. 2
   Temperaturafter cooling it
3. 3
   Sonstigeis evaporated down
4. 4
   workup.ADDITIONThe residue is treated with petroleum ether/ethyl acetate 9:1 in the ultrasound bath
5. 5
   Filtrationfiltered
6. 6
   Sonstigedried
7. 7
   Sonstige8.3 g (III-2) are obtained as a solid

Vorschrift

7.2 g 2,4-dichloro-6,7-dihydro-thieno[3,2-d]pyrimidine (II) are placed in 36 ml dioxane, then 18 ml diisopropylethylamine and then 6.1 g (R)-(−)-2-amino-3-methyl-1-butanol are added. The reaction mixture is heated to 100° C. until there is no further reaction and after cooling it is evaporated down. The residue is treated with petroleum ether/ethyl acetate 9:1 in the ultrasound bath and the solid is suction filtered and dried. 8.3 g (III-2) are obtained as a solid. Analytical HPLC (method A): RT=2.75 min

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