Annulative Morita–Baylis–Hillman reaction to synthesise chiral dibenzocycloheptanes
作者:Atanu Mondal、Shivangi、Pinku Tung、Siddhant V. Wagulde、S. S. V. Ramasastry
DOI:10.1039/d1cc02765d
日期:——
We describe the first metal-free and organocatalytic strategy to accesshighlyfunctionalised dibenzocycloheptanes via a phosphine-promoted annulative Morita–Baylis–Hillman (MBH) reaction. The method is manipulated to access to chiral dibenzocycloheptanes as well. This work represents a rare entry for the construction of seven-membered carbocycles via the MBH route. The realisation of several bioactive
Copper-Catalyzed Intramolecular Tandem Reaction of (2-Halogenphenyl)(3-phenyloxiran-2-yl)methanones: Synthesis of (<i>Z</i>)-Aurones
作者:Yiyi Weng、Qixu Chen、Weike Su
DOI:10.1021/jo500483u
日期:2014.5.2
A convenient and efficient method for the copper-catalyzed synthesis of (Z)-aurones via intramolecular tandem reaction of (2-halogenphenyl)(3-phenyloxiran-2-yl)methanones is reported. Moreover, a plausible mechanism for the formation of (Z)-aurones is proposed. This is the first report on the synthesis of (Z)-aurones throughcopper-catalyzedUllmanncoupling reaction employing epoxides as substrates