racemic 1-((2-chloro-9-methyl-6-morpholino-9H-purin-8-yl)methyl)-3-fluoro-N,N-dimethylpiperidin-4-amine 、
2-乙基苯并咪唑 以to give 226的产率得到(3R,4S)-1-((2-(2-ethyl-1H-benzo[d]imidazol-1-yl)-9-methyl-6-morpholino-9H-purin-8-yl)methyl)-3-fluoro-N,N-dimethylpiperidin-4-amine