5-hydroxy and methoxy flavylium salts
Tóm tắt
Starting from γ-resorcylic aldehyde some typical 5-hydroxy and methoxy flavylium salts have been prepared and studied. They exhibit negligible fluorescence even in concentrated sulphuric acid. The structural factors that affect fluorescence in flavylium salts are discussed and comparison effected with coumarins.
Tài liệu tham khảo
Shah and LaiwallaJ.C.S., 1938, 1828.
Ridgway and RobinsonIbid. J.C.S., 1924, 215.
Leon, Robertson, Robinson and SeshadriIbid., J.C.S., 1931, 2675.
Robinson and VaseyIbid., J.C.S., 1941, 660.
Balaiah, Seshadri and VenkateswarluProc. Ind. Acad. Sci., 1942,16, 68. Rangaswami and SeshadriIbid., Proc. Ind. Acad. Sci., 1940,12, 375. Rangaswami, Seshadri and VenkateswarluIbid. Proc. Ind. Acad. Sci., 1941,13, 316.
LimayeRasayanam, 1936,1, 12.