A synthetic application of the rate difference in oxidation of regioisomerically substituted N-acyldihydropyridines is reported. This has allowed for isolation of pure 4-substituted pyridine isomers without the need for chromatography. Diels-Alder adducts between a dihydropyridine and DDQ were isolated and formation of novel hydroquinone ethers was also observed during some reactions.
报道了区域异构取代的N-酰基
二氢吡啶氧化速率差异的综合应用。这一方法使得无需色谱分离即可获得纯的4-取代
吡啶异构体。在某些反应中,
二氢吡啶与
DDQ的Diels-Alder加合物被分离出来,并且观察到了新型的
氢醌醚的形成。