N,N'-dicarbobenzyloxy-6'-hydroxyspectinomycin                                                                                                                                                              在
                                                                                                                                                                                 
四溴化碳   、                                                                                                  
三苯基膦                                                                                                                                  作用下,
                                                                                                                                                                                                                            以37%的产率得到[(2S,4aR,5S,6S,7R,8S,8aR,9aR,10aR)-5-(Benzyloxycarbonyl-methyl-amino)-2-bromomethyl-4a,6,8-trihydroxy-4-oxo-decahydro-1,9,10-trioxa-anthracen-7-yl]-methyl-carbamic acid benzyl ester