9-[(2R,3S)-3-(tert-butyldimethylsilyloxy)nonan-2-yl]-6-chloro-9H-purine   、                                                                                      
氨   、                                                                                      
methanol-dichloromethane                                                                                                                                                              在
                                                                                                                                                                                 silica gel   、                                                                                                  
methanol-dichloromethane                                                                                                                                  作用下,
                                                                                                                                                                                        反应 18.0h,
                                                                                                                以gave 9-[(2R,3S)-3-(tert-butyldimethylsilyloxy)nonan-2-yl]-9H-purin-6-amine (Rf 0.23) (321 mg, 0.820 mmol; 75%) as a white solid and 9-[(2R,3S)-3-(tert-butyldimethylsilyloxy)nonan-2-yl]-6-methoxy-9H-purine (Rf 0.63) (88 mg, 0.216 mmol; 20%) as a dense colourless oil的产率得到9-[(2R,3S)-3-(tert-butyldimethylsilyloxy)nonan-2-yl]-9H-purin-6-amine