CERIUM(IV) AMMONIUM NITRATE MEDIATED NITRATION OF COUMARINS
作者:N. Ganguly、A. K. Sukai、S. De
DOI:10.1081/scc-100000214
日期:2001.1
A new convenient method of nitration of coumarins using cerium(IV) ammonium nitrate (CAN) has been developed. Higher regioselectivity is observed with CAN and hydrogen peroxide in aqueous medium in comparison with CAN in acetic acid for nitration of 7-hydroxycoumarin, 7-hydroxy-4-methyl coumarin and their derivatives.
已经开发了一种使用硝酸铈 (IV) 铵 (CAN) 硝化香豆素的新方法。与乙酸中的 CAN 相比,CAN 和过氧化氢在水性介质中对 7-羟基香豆素、7-羟基-4-甲基香豆素及其衍生物的硝化具有更高的区域选择性。
A Facile One Pot Synthesis of New Tricyclic Coumarins from Single Synthon
作者:Rajesh G. Kalkhambkar、Geeta M. Kulkarni、Manohar V. Kulkarni
DOI:10.1002/jhet.1032
日期:2013.7
A high yielding method for the synthesis of new tricyclic coumarins is reported herein using 8‐formyl‐7‐hydroxy‐4‐methyl coumarin as a single synthon. Different strategies were employed to synthesize tricyclic coumarins fused with isoxazole and pyran at C7‐C8 position in the coumarin skeleton. Functional group modifications during the construction of pyrazolyl coumarin has resulted in novel oxidative