1-tert-butyl-7-chloro-1-1,4-dihydro-8-methyl-6-nitro-4-oxoquinolone-3-carboxylic acid   、                                                                                      
1,2,3,4,5,6,7,8-八氢-1-[(4-甲氧基苯基)甲基]异喹啉                                                                                                                                                              在
                                                                                                                                                                                 
potassium carbonate                                                                                                                                  作用下,
                                                                                                                以
                                                                                         
二甲基亚砜                                                                                  为溶剂,
                                                                                                                                                                                        以90%的产率得到1-tert-butyl-1,4-dihydro-7-(8-(4-methoxybenzyl)-3,4,5,6,7,8-hexahydroisoquinolin-2(1H)-yl)-8-methyl-6-nitro-4-oxoquinoline-3-carboxylic acid