Seven novel ferrocene-coumarin conjugates, namely FcL1~FcL7, were synthesized and confirmed by 1H NMR, FT-IR, elemental analysis. The crystal structure of FcL3 was determined by X-ray diffraction, showing that the dihedral angle between the coumarin and the substituted cyclopentadienyl ring was 80.67°. The electrochemical behaviors of FcL1~FcL7 exhibited similar quasireversible redox waves, while the
REGIOSELECTIVE MONONITRATION OF COUMARINS USING CHROMIUM NITRATE AS NITRATING AGENT
作者:Vandana Bansal、R. N. Khanna
DOI:10.1081/scc-120003630
日期:2002.1
ABSTRACT A very efficient and simple method is presented for the regioselective mononitration of coumarins, using chromium nitrate in acetic anhydride, in high yields at room temperature.