草酸醛   、                                                                                      
(2S,3S,5R)-2-Benzyloxymethyl-5-[3-(4-methoxy-benzyloxymethyl)-5-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-yl]-tetrahydro-furan-3-carbaldehyde                                                                                                                                                              在
                                                                                                                                                                                 
ammonium hydroxide                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
1,4-二氧六环                                                                                  为溶剂,
                                                                                                                                                    反应 4.0h,
                                                                                                                以49%的产率得到1-[(2R,4R,5S)-5-Benzyloxymethyl-4-(1H-imidazol-2-yl)-tetrahydro-furan-2-yl]-3-(4-methoxy-benzyloxymethyl)-5-methyl-1H-pyrimidine-2,4-dione