Isopropanol → 8-Chloro-2-phenyl-3-[(1S)-1-[[9-(tetrahydro-2H-pyran-2-yl)-9H-purin-6-yl]amino]ethyl]-1(2H)-isoquinolinone

Participants

Reaction Conditions

Reaction Steps

3-(1-Aminoethyl)-8-chloro-2-phenylisoquinolin-1(2H)-one (Compound 9) (150 g; 90% ee) and 6-chloro-9-(tetrahydro-2H-pyran-2-yl)-9H-purine (Compound 4) (216 g, 1.8 equiv) were charged to a round bottom flask followed by addition of IPA (1.2 L; 8 vol) and triethylamine (175 mL; 2.5 equiv). The resultant slurry was stirred at reflux for one day. Heptane (1.5 L; 10 vol) was added dropwise over two hours. The batch was then cooled to 0-5° C., held for one hour and filtered. The cake was washed with heptane (450 mL; 3 vol) and returned to the reactor. IPA (300 mL; 2 vol) and water (2.25 L; 15 vol) were added and the resultant slurry stirred at 20-25° C. for three and half hours then filtered. The cake was washed with water (1.5 L; 10 vol) and heptane (450 mL; 3 vol) and then vacuum dried at 48° C. for two and half days to give 227 g (90.1%) of the intermediate (Compound 10) as an off-white solid with >99% (AUC) purity and >94% ee (chiral HPLC). The ee was determined by converting a sample of the cake to the final product and analyzing it with chiral HPLC.

Provenance & Evidence