4-Hydroxy-1 H -quinolin-2-ones(1)在乙酸中与硫氰酸根反应生成相应的3-thiocyanato-1 H,3 H -quinoline-2,4-diones(2),产率高。在某些情况下,3-溴1 H,3 H-喹啉-2,4-二酮(4)被分离为次要反应产物。化合物2对亲核试剂具有很高的反应性,并容易水解为相应的4-羟基-1 H-喹啉-2-酮(1)。
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.