重氮甲烷   、                                                                                      4-benzyloxy-5-chloro-2-(5'-hydroxy-2'-methoxy-4'-methoxycarbonyl-3',6'-dimethylphenoxy)-6-methylbenzoic acid                                                                                                                                                                                              以
                                                                                         
甲醇   、                                                                                         
乙醚                                                                                  为溶剂,
                                                                                                                                                    反应 0.05h,
                                                                                                                以90%的产率得到methyl 4-benzyloxy-5-chloro-2-(5'-hydroxy-2'-methoxy-4'-methoxycarbonyl-3',6'-dimethylphenoxy)-6-methylbenzoate