Synthesis of Highly Functionalized 9,10-Phenanthrenequinones by Oxidative Coupling Using MoCl5
摘要:
The strong oxidative power of molybdenum pentachloride gives rise to an efficient oxidative C-C bond formation of benzil derivatives to the corresponding 9,10-phenanthrenequinones. A highly complementary method to previous approaches was developed. The required derivatives are accessible in a modular fashion and in excellent yields. By this approach the orchid-derived natural product cypripediquinone A was synthesized for the first time.
Iodinated Biaryls Synthesized by the Direct Dehydrodimerization of Iodoarenes Using Phenyliodine(III) Bis(trifluoroacetate) (PIFA)
作者:Daniela Mirk、Alexander Willner、Roland Fröhlich、Siegfried R. Waldvogel
DOI:10.1002/adsc.200404024
日期:2004.5
Multiply iodinatedbiaryls can be prepared in yields up to 75% by direct oxidative coupling reaction of the iodinated arenes. The PIFA-mediated dehydrodimerization is superior to all other known methods. The developed protocol is reliable and easy to perform.
Powerful Fluoroalkoxy Molybdenum(V) Reagent for Selective Oxidative Arene Coupling Reaction
作者:Moritz Schubert、Jana Leppin、Kathrin Wehming、Dieter Schollmeyer、Katja Heinze、Siegfried R. Waldvogel
DOI:10.1002/anie.201309287
日期:2014.2.24
fluoroalkoxy molybdenum(V) reagent 1 which has superior reactivity and selectivity in comparison to MoCl5 or the MoCl5/TiCl4 reagent mixture in the oxidativecoupling reactions of aryls. Common side reactions, such as chlorination and/or oligomer formation, are drastically diminished creating a powerful and useful reagent for oxidativecoupling. Theoretical treatment of the reagent interaction with 1,2‐
Dehydrodimerization of iodobenzenes to iodinated biaryls
作者:Siegfried R. Waldvogel、Eckhard Aits、Christiane Holst、Roland Fröhlich
DOI:10.1039/b202841g
日期:2002.5.30
The molybdenum pentachloride-mediated oxidative coupling of iodo-substituted electron rich benzenes without the loss of the iodo-substituents is reported. The presented methodology is an environmentally friendly alternative to known thallium(III)- and lead(IV)-reagents. Even 2,2',6,6'-tetraiodobiphenyl derivatives are easily accessible.
Synthesis of Highly Functionalized 9,10-Phenanthrenequinones by Oxidative Coupling Using MoCl<sub>5</sub>
作者:Simon Trosien、Siegfried R. Waldvogel
DOI:10.1021/ol300948u
日期:2012.6.15
The strong oxidative power of molybdenum pentachloride gives rise to an efficient oxidative C-C bond formation of benzil derivatives to the corresponding 9,10-phenanthrenequinones. A highly complementary method to previous approaches was developed. The required derivatives are accessible in a modular fashion and in excellent yields. By this approach the orchid-derived natural product cypripediquinone A was synthesized for the first time.