3-tert-butyldimethylsiloxy-3',4'-dihydrospirocyclobutane-1,2'-pyrano[2,3-c]pyridin-4'-one   、                                                                                      
3-tert-butyldimethylsiloxy-3',4'-dihydrospirocyclobutane-1,2'-pyrano[2,3-c]pyridin-4'-one                                                                                                                                                              在
                                                                                                                                         
四丙基高钌酸铵                                                                                                                                                                                                                               四丁基溴化铵   、                                                                                                  sodium formate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
甲苯                                                                                  为溶剂,
                                                                                                                                                    反应 14.0h,
                                                                                                                生成                                                 (4'R)-3-tert-butyldimethylsiloxy-3',4'-dihydrospirorcyclobutane-12'-pyrano[2,3-c]pyridin-4'-ol   、                                                                                             
(4'R)-3-tert-butyldimethylsiloxy-3',4'-dihydrospirorcyclobutane-12'-pyrano[2,3-c]pyridin-4'-ol