(9R,10R)-8-(tert-Butyl-dimethyl-silanyloxy)-1-(4-methoxy-phenyl)-11-oxa-4-aza-tricyclo[6.2.1.0
2,7]undeca-2(7),3,5-triene-9,10-dicarboxylic acid dimethyl ester 在
对甲苯磺酸 作用下,
以
苯 为溶剂,
以80%的产率得到5-Hydroxy-8-(4-methoxy-phenyl)-isoquinoline-6,7-dicarboxylic acid dimethyl ester