(2R,3R,4R,5R)-4-(acetoxy)-2-(6-chloro-9H-purin-9-yl)-5-(prop-2-ynyl)tetrahydrofuran-3-yl acetate   、                                                                                      
4-氨基四氢吡喃盐酸盐                                                                                                                                                              在
                                                                                                                                                                                 
N,N-二异丙基乙胺                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
异丙醇                                                                                  为溶剂,
                                                                                                                                                    反应 2.5h,
                                                                                                                以36%的产率得到(2R,3R,4R,5R)-4-(acetoxy)-2-{6-[tetrahydro-2H-pyran-4-ylamino]-9H-purin-9-yl}-5-(prop-2-ynyl)tetrahydrofuran-3-yl acetate