O-alkylated products. The behavior in basic medium of compounds 1 differs from the 3-alkoxycarbonyl-4-quinolinones (4) isomers suggesting that the position of the carboxylate group determines the regioselectivity of the reaction. DFT calculations allow us to conclude that for 3-alkoxycarbonyl-4-quinolinones, the N-alkylation would be thermodynamically and kinetically favored. But for 2-alkoxycarbonyl-4-quinolinones
摘要 2-烷氧基羰基-4-
喹啉酮(1) 与多种烷基化试剂在不同条件下反应,生成相应的O-烷基化产物。化合物 1 在碱性介质中的行为不同于 3-alkoxycarbonyl-4-quinolinones (4) 异构体,表明
羧酸根的位置决定了反应的区域选择性。DFT 计算使我们得出结论,对于 3-烷氧基羰基-4-
喹啉酮,N-烷基化在热力学和动力学上都是有利的。但是对于 2-烷氧基羰基-4-
喹啉酮,环的 2-位侧链阻止了与连续杂原子的平面近似,从而导致更有利的 O-烷基化过渡态。O-烷基化产物的晶体结构由单晶 X 射线衍射测定。