1-[1-((R)-1-benzyloxymethylprop-2-ynyloxy)-2-bromoethyl]-3-methyl-1H-pyrimidine-2,4-dione                                                                                                                                                              在
                                                                                                                                                                                 
偶氮二异丁腈   、                                                                                                  
三正丁基氢锡                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
苯                                                                                  为溶剂,
                                                                                                                                                    反应 2.0h,
                                                                                                                生成                                                 3-Methyl-1-((2S,3aR,4S,6aR)-3a-methyl-4-phenyl-hexahydro-furo[3,4-b]furan-2-yl)-1H-pyrimidine-2,4-dione   、                                                                                             syn-1-(5'-benzyloxymethyl-4-methylenetetrahydrofuran-2-yl)-3-methyl-(1H,3H)-pyrimidine-2,4-dione   、                                                                                             anti-1-(5'-benzyloxymethyl-4-methylenetetrahydrofuran-2-yl)-3-methyl-(1H,3H)-pyrimidine-2,4-dione