tert-Butyl 9-(2,6-difluorobenzyl)-2-(6-cyano-1H-benzo[d]imidazol-1-yl)-8-oxo-8,9-dihydropurine-7-carboxylate                                                                                                                                                              在
                                                                                                                                                                                 
乙醚   、                                                                                                  
盐酸                                                                                                                                  作用下,
                                                                                                                以
                                                                                         trifluoracetic acid-dichloromethane                                                                                  为溶剂,
                                                                                                                                                    反应 1.0h,
                                                                                                                以gave the titled compound (61) (68 mg) as a HCl salt, MH+=404, 1H NMR (d6-DMSO) δ 11.8 (s, 1H), 9.2 (s, 1H), 8.8 (s, 1H), 8.0 (s, 1H), 7.9 (d, 1H), 7.8 (broad s, 1H), 7.4 (d, 1H), 7.4 (quintet, 1H), 7.1 (m, 2H), 5.2 (s, 2H) ppm, 19F NMR δ −114.3 (m)的产率得到1-(9-(2,6-difluorobenzyl)-8-oxo-8,9-dihydro-7H-purin-2-yl)-1H-benzo[d]imidazole-6-carbonitrile