(3S,4R)-3-[(1S)-2-fluoro-1-(trimethylsilyloxy)ethyl]-4-[(1R,3S)-3-methoxy-2-oxocyclohexyl]-allyloxalyl-2-azetidione                                                                                                                                                              在
                                                                                                                                                                                 
对苯二酚   、                                                                                                  
亚磷酸三乙酯                                                                                                                                  作用下,
                                                                                                                                                                                        反应 4.0h,
                                                                                                                以61%的产率得到allyl (4S,8S,9R,10S)-4-metoxy-10-[2'-fluoro-1-(S)-(trimethylsilyloxy)ethyl]-11-oxo-azatricyclo[7.2.0.0(3,8)] undec-2-ene-2-carboxylate