6-Mesyl-2,3-dimethyl-1-phenylchinoxalinium-perchlorat 、
6-Mesyl-3-methyl-2-methyliden-1-phenyl-1,2-dihydrochinoxalin 在
copper diacetate 作用下,
以
乙腈 为溶剂,
反应 0.33h,
以46%的产率得到6,6'-Dimesyl-3,3'-dimethyl-1,1'-diphenyl-1,1',2,2'-tetrahydro-2,2'-aethandiylidendichinoxalin