Thermal Rearrangement of 3-Hydroxy-1H,3H-quinoline-2,4-diones to 3-Acyloxy-2,3-dihydro-1H-indol-2-ones
摘要:
3-Alkyl/aryl-3-hydroxy-1H,3H-quinoline-2,4-diones (2) were transformed into isomeric 3-acyloxy-2,3-dihydro-1H-indol-2-ones (3) by thermally induced molecular rearrangement. All products were characterized by their H-1 NMR, C-13 NMR, and IR spectra.
3‐Hydroxyquinoline‐2,4‐diones 1 react with isocyanates to give novel 1,2,3,4‐tetrahydro‐2,4‐dioxoquinolin‐3‐yl (alkyl/aryl)carbamates 2 and/or 1,9b‐dihydro‐9b‐hydroxyoxazolo[5,4‐c]quinoline‐2,4(3aH,5H)‐diones 3. Both of these compounds are converted, by boiling in cyclohexylbenzene solution in the presence of Ph3P or 4‐(dimethylamino)pyridine, to give 3‐(acyloxy)‐1,3‐dihydro‐2H‐indol‐2‐ones 8. All
3-羟基喹啉-2,4-二酮1与异氰酸酯反应生成新颖的1,2,3,4-四氢-2-2,4-二氧喹啉-3-基(烷基/芳基)氨基甲酸酯2和/或1,9b-二氢‐9b‐羟基恶唑啉[5,4‐ c ]喹啉‐2,4(3a H,5 H)‐二酮3。通过在Ph 3 P或4-(二甲氨基)吡啶的存在下在环己基苯溶液中煮沸将这两种化合物转化为3-(酰氧基)-1,3-二氢-2 H-吲哚-2-酮8。所有化合物均通过IR,1 H-和13 C-NMR光谱以及EI质谱进行表征。
DBU mediated coupling of isatin with phenacyl azides: synthesis of 2-oxoindolin-3-ylbenzoates
N-Heterocyclic carbene-catalyzed hydroacylation of isatins with aldehydes: access to 3-acyloxy-1,3-dihydro-2H-indol-2-ones
作者:Ding Du、Yingyan Lu、Jianlin Jin、Weifang Tang、Tao Lu
DOI:10.1016/j.tet.2011.07.075
日期:2011.9
The N-heterocyclic carbene-catalyzed hydroacylation of isatins with aldehydes has been described. This process offers a highly efficient and atom-ecomonical access to 3-acyloxy-1,3-dihydro-2H-indol-2-ones in good to excellent yields. (C) 2011 Elsevier Ltd. All rights reserved.
Heller, Chemische Berichte, 1904, vol. 37, p. 944
作者:Heller
DOI:——
日期:——
Heller; Lauth, Chemische Berichte, 1929, vol. 62, p. 350