An economical and environmentally friendly oxidative biaryl coupling promoted by activated MnO<sub>2</sub>
作者:Jingjing Yang、Shutao Sun、Ziyu Zeng、Hongbo Zheng、Wei Li、Hongxiang Lou、Lei Liu
DOI:10.1039/c4ob01409j
日期:——
An activated manganese dioxide (MnO2)–BF3·OEt2 oxidation system was developed to efficiently mediate the intramolecular as well as intermolecular biaryl coupling. The oxidative coupling proceeds smoothly at ambient temperature to deliver the corresponding five- to eight-membered tricyclic products in good to excellent yields. The employment of the combination of MnO2 and BF3·OEt2 is attractive on the basis of economical and environmental issues.
A compound of formula (I) is described; wherein the substituents are as defined in the text and wherein the compound is intended for use in the production of a vascular damaging effect in a warm-blooded animal.
A compound of formula (I) is described; wherein the substituents are as defined in the text and wherein the compound is intended for use in the production of a vascular damaging effect in a warm-blooded animal.