Reactions of vinylsilanes with lewis acid-activated iodosylbenzene: stereospecific syntheses of vinyliodonium tetrafluoroborates and their reactions as highly activated vinyl halides
salts behave like the highly activated species of vinyl iodides due to the high leaving ability of the iodine(III) substituents. Thus, a variety of substituted olefins including α-cyano and α-nitro olefins, vinyl sulfides, vinyl halides, and α,β-unsaturated esters, were synthesized from under mild conditions. A ligand coupling mechanism via the formation of 10-I-3 intermediate containing a copper(III)
Development of Regio- and Face-selective [2 + 3] Cycloaddition Reactions of Readily Preparable Oxime-substituted Nitrile Oxides with Silicon-linked Allylic-alcohol Moieties for Intramolecular Reactions
作者:Nao Umemoto、Ayumi Imayoshi、Kazunori Tsubaki
DOI:10.1246/cl.220258
日期:2022.9.5
typically prepared in situ from nitroalkanes and converted to 2-isoxazoline heterocycles upon [2 + 3] cycloaddition with alkenes, providing synthetically useful intermediates such as β-hydroxy ketones and γ-amino alcohols. Herein, we prepared oxime-substituted nitrile oxides bound to allylic-alcohol derivatives through a silicon atom and demonstrated their intramolecular cycloaddition reactions. The desired