Efficient Stereoselective Synthesis of Nitrocyclopropanes by the Oxidative Cyclization of Michael Adducts of Nitroolefins with Activated Methylene Compounds
作者:Renhua Fan、Yang Ye、Weixun Li、Lingfei Wang
DOI:10.1002/adsc.200800452
日期:2008.11.3
An efficientoxidative cyclopropanation of the Michaeladducts of nitroolefins with activatedmethylenecompounds by the combination of iodobenzene diacetate and tetrabutylammonium iodide is reported. Highly functionalized nitrocyclopropanes are synthesized in moderate to good yields via the Michael addition and cyclopropanation with high diastereoselectivity and enantioselectivity under mild conditions
Iodobenzene-Catalyzed Oxidative Cyclization for the Synthesis of Highly Functionalized Cyclopropanes
作者:Yang Li、Hao Guo、Renhua Fan
DOI:10.1055/s-0039-1690809
日期:2020.3
iodobenzene-catalyzed oxidative cyclization of Michael adducts of activated methylene compounds with nitroolefins or chalcones is developed. mCPBA is used as oxidant together with Bu4NI for the generation of a highly reactive iodine(III) species to mediate the cyclopropanation via a ligand exchange and reductive elimination process. A range of highly functionalized cyclopropanes are synthesized with