Chemistry of Coumarins. - Nucleophilic Substitutions of 4-Chloro-3-nitrocoumarin with Hard and Soft Nucleophiles
作者:K. Tabaković、I. Tabaković、M. Trkovnik、N. Trinajstić
DOI:10.1002/jlac.198319831105
日期:1983.11.15
Reactions of 4-chloro-3-nitrocoumarin with a variety of nucleophiles produced a number of novel substituted coumarins. Hard and borderline nucleophiles exclusively substitute chlorine in position 4, while soft nucleophiles substitute the nitro group in position 3 (except for iodide) of the title compound. This result of the nucleophilic substitution of 4-chloro-3-nitrocoumarin is rationalized in terms
4-氯-3-硝基香豆素与各种亲核试剂的反应产生了许多新颖的取代香豆素。硬亲核亲核试剂仅取代第4位的氯,而软亲核亲核试剂取代标题化合物第3位的硝基(碘化物除外)。根据HSAB模型,对4-氯-3-硝基香豆素进行亲核取代的结果是合理的。