2-[2-(tert-Butoxycarbonyl-methyl-amino)-3-(4-hydroxy-5,7,8-trimethoxy-6-methyl-1-vinyl-3,4-dihydro-1H-isoquinolin-2-yl)-3-oxo-propyl]-2-dimethoxymethyl-malonic acid dimethyl ester                                                                                                                                                              在
                                                                                                                                                                                 Collins oxidation agent   、                                                                                                  
三氟化硼乙醚                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二氯甲烷                                                                                  为溶剂,
                                                                                                                                                    反应 7.0h,
                                                                                                                生成                                                 2-[(R)-2-(Formyl-methyl-amino)-3-oxo-3-((S)-5,7,8-trimethoxy-6-methyl-4-oxo-1-vinyl-3,4-dihydro-1H-isoquinolin-2-yl)-propyl]-malonic acid dimethyl ester