tetrahydropyrido[4,3-d]pyrimidines. Reaction with methylthiocyanate forms the corresponding methylthio substituted tetrahydropyridopyrimidines which can be easily converted into dimethoxy and dicarbonyl derivatives.
在三氟甲磺酸酐的存在下,1-苄基哌啶-4-酮与不同腈的一锅反应可得到取代的四氢吡啶并[4,3- d ]嘧啶。与甲基硫氰酸酯反应形成相应的甲硫基取代的四氢吡啶并嘧啶,其可以容易地转化为二甲氧基和二羰基衍生物。