Réaction #421300

Équation de réaction

4-(2-chloro-9-(tetrahydro-2H-pyran-2-yl)-9H-purin-6-yl)morpholine

n-butyllithium

hexane

1-chloro-2-iodoethane

→

desired product

4-(2-chloro-8-iodo-9-(tetrahydro-2H-pyran-2-yl)-9H-purin-6-yl)morpholine

Solvants

THF

Conditions de réaction

Traitement

1. 1
   workup.ADDITIONwas introduced
2. 2
   workup.STIRRINGStirring

Mode opératoire

To a solution of 4-(2-chloro-9-(tetrahydro-2H-pyran-2-yl)-9H-purin-6-yl)morpholine (1.0 g, 3.1 mmol) and N,N,N′,N′-tetramethylenediamine (0.7 mL, 4.6 mmol) in anhydrous THF (23 mL) at −42° C. was added 2.5 M n-butyllithium solution in hexane (4.3 mL, 11.0 mmol) dropwise down the side of the reaction flask. The reaction was stirred at cold temperature and maintained for 1 h before 1-chloro-2-iodoethane (1.4 mL, 15 mmol) was introduced. Stirring was continued for 1.5 h period. LC-MS indicated the reaction had reached complete conversion to the desired product. The reaction mixture was subsequently quenched and worked up with sat. NH4Cl aqueous solution which was extracted with EtOAc (3 times), dried over MgSO4, filtered and concentrated in vacuo to give 4-(2-chloro-8-iodo-9-(tetrahydro-2H-pyran-2-yl)-9H-purin-6-yl)morpholine (1.4 g, 84% yield) determined by LC-MS to be >90% purity. MS (ESI+): m/z 450.1 (M+H+)

Source