Reaction of 3??Hydroxyquinoline??2, 4??diones with Isocyanates and Thermally Induced Transformation of the Reaction Products
V Mrkvička, A Lyčka, R Vicha…
Index: Mrkvicka, Vladimir; Lycka, Antonin; Vicha, Robert; Klasek, Antonin Helvetica Chimica Acta, 2011 , vol. 94, # 1 p. 78 - 91
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Abstract
Abstract 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 Ph 3 P or 4- (dimethylamino) pyridine, to give 3-(acyloxy)-1, 3-dihydro-2H-indol-2-ones 8. All ...
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