Synthesis of Novel 3-Acyloxy-1,3-dihydro-2H-indol-2-ones and Isomeric 4-Acyl-1,4-dihydro-3,1-benzoxazin-2-ones: Double Rearrangement of 3-Hydroxyquinoline-2,4(1H,3H)-diones
作者:Antonı́n Klásek、Kamil Kořistek、Jiřı́ Polis、Janez Košmrlj
DOI:10.1016/s0040-4020(00)00057-0
日期:2000.3
3-dihydro-2H-indol-2-ones 4 and isomeric 4-acyl-1,4-dihydro-3,1-benzoxazin-2-ones 5. The influence of the substituents and the reaction conditions on the course of the reaction was studied. In the proposed mechanism a double rearrangement takes place; α-ketol rearrangement of 3, leading to α-hydroxy-β-diketone intermediate 8, is followed by a rearrangement to the isomeric α-ketol-esters 4 and 5.
取代的3-羟基喹啉-2,4(1 H,3 H)-二酮3转化为3-酰氧基-1,3-二氢-2 H-吲哚-2-酮4和异构体4-酰基-1,4-二氢3,1-苯并恶嗪-2-酮5。研究了取代基和反应条件对反应过程的影响。在所提出的机制中,发生了双重重排。α酮醇重排的3,导致α羟基β二酮中间体8,之后是重排同分异构的α酮醇酯4和5。