4-Oxo-pentanoic acid (2S,3S,4S,5R,6R)-4,5-bis-allyloxycarbonyloxy-2-methoxy-6-(4-oxo-pentanoyloxymethyl)-tetrahydro-pyran-3-yl ester                                                                                                                                                              在
                                                                                                                                                                                 
溶剂黄146   、                                                                                                  
肼                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
四氢呋喃   、                                                                                         
甲醇                                                                                  为溶剂,
                                                                                                                                                    反应 0.67h,
                                                                                                                以90%的产率得到Carbonic acid allyl ester (2R,3R,4R,5S,6S)-4-allyloxycarbonyloxy-5-hydroxy-2-hydroxymethyl-6-methoxy-tetrahydro-pyran-3-yl ester