Réaction #67622

Équation de réaction

carbonate

(R)-7-chloro-5-cyclopentyl-4-ethyl-4,5-dihydro-[1,2,4]triazolo[4,3-f]pteridine

methylamine

TFA

→

title compound

Rendement 61.0%

(R)-5-cyclopentyl-4-ethyl-N-methyl-4,5-dihydro-[1,2,4]triazolo[4,3-f]pteridin-7-amine

Rendement 61.0%

Solvants

acetonitrile water

ethanol

Conditions de réaction

Traitement

1. 1
   Autrewas sealed
2. 2
   TempératureAfter cooling
3. 3
   Autrethe solvent was removed under reduced pressure
4. 4
   Autrethe crude product was purified by reverse phase preparative HPLC [Waters Sunfire C18, 10 M, 100 Å column, gradient 10%-95% B (solvent A: 0.05% TFA in water; solvent B: CH3CN) over 16 minutes at 25 mL/min]
5. 5
   AutreThe free base was obtained

Mode opératoire

In a vial containing (R)-7-chloro-5-cyclopentyl-4-ethyl-4,5-dihydro-[1,2,4]triazolo[4,3-f]pteridine (70 mg, 0.23 mmol) was added a solution of methylamine in ethanol (2 mL, 2M soln.) The vessel was sealed then heated at 50° C. for 18 hours. After cooling, the solvent was removed under reduced pressure and the crude product was purified by reverse phase preparative HPLC [Waters Sunfire C18, 10 M, 100 Å column, gradient 10%-95% B (solvent A: 0.05% TFA in water; solvent B: CH3CN) over 16 minutes at 25 mL/min]. The free base was obtained by passing the TFA salt in acetonitrile/water through a carbonate cartridge to afford the title compound as a white powder (42 mg, 61% yield).

Source