1,4-Dihydro-2,6-dimethyl-4-<(2,5-dihydroxy-4-methyl)-phenyl>-pyridin-3,5-dicarbonsaeuredimethylester 在
magnesium sulfate 、
silver(l) oxide 作用下,
以
四氢呋喃 为溶剂,
以80%的产率得到1,4-Dihydro-2,6-dimethyl-4-(5-methyl-1,4-benzochinonyl-2)pyridin-3,5-dicarbonsaeuredimethylester