6,7-二甲氧基-1,2,3,4-四氢异喹啉 、
1-tert-butyl-7-chloro-1-1,4-dihydro-8-methyl-6-nitro-4-oxoquinolone-3-carboxylic acid 在
potassium carbonate 作用下,
以
二甲基亚砜 为溶剂,
以88%的产率得到1-tert-butyl-1,4-dihydro-7-(3,4-dihydro-6,7-dimethylisoquinolin-2(1H)-yl)-8-methyl-6-nitro-4-oxoquinoline-3-carboxylic acid