4-Hydroxy-2-quinolones. 175.*Reaction of -1-allyl-3-[(arylamino)methylene]quinoline-2,4-(1H,3H)-diones with bromine
摘要:
NMR spectroscopy showed that treatment of 1-allyl-3-[(arylamino) methylene] quinoline-2,4-(1H, 3H)-diones with an equivalent amount of dry bromine in anhydrous acetic acid leads to the formation of 4-aryliminomethyl-2-bromomethyl-5-oxo-1,2-dihydro-5H-oxazolo[ 3,2-a] quinolinium bromides.