(3-{[[3-(6-amino-2-butoxy-8-oxo-7,8-dihydro-9H-purin-9-yl)propyl](3-hydroxypropyl)amino]methyl}phenyl) acetic acid methyl ester   、                                                                                      
氯化亚砜                                                                                                                                                                                              以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 16.0h,
                                                                                                                以to give the subtitle product (0.55 g)的产率得到methyl [3-({[3-(6-amino-2-butoxy-8-oxo-7,8-dihydro-9H-purin-9-yl)propyl](3-chloropropyl)amino}methyl)phenyl]acetate