A process for preparing a tetrahydroquinolone ether represented by formula (i) and a novel intermediate represented by formula (VIII) for preparing said ether; wherein R' represents a straight-chain or branched alkyl group having 1 to 4 carbon atoms and R3 represents an alkylsulfonyloxy, arylsu- lfonyloxy, acyloxy or hydroxy group or a halogen atom. This process is characterized in that a 3-substituted 1,2-propylene oxide or 3-substituted 1,2-propanediol is reacted with octahydroquinoline-2,5-dione in the presence of an acid catalyst to produce a compound of the above general formula (VII), which i3 the m reacted with an alkylamine represented by the formula of R1-NH2 (wherein R' is as defined above) to produce a novel compound represented by formula (VIII),
一种制备式(i)代表的
四氢喹啉酮醚的工艺和一种制备所述醚的式(VIII)代表的新型中间体;其中R'代表具有1至4个碳原子的直链或支链烷基,R3代表烷基磺酰氧基、芳基磺酰氧基、酰氧基或羟基或卤原子。该工艺的特点是,在酸催化剂存在下,将 3-取代的 1,2-环氧
丙烷或 3-取代的 1,2-
丙二醇与八氢
喹啉-2,5-二酮反应,生成上述通式(VII)的化合物,再与 R1-NH2(其中 R'如上定义)式所代表的烷基胺反应,生成式(VIII)所代表的新型化合物、