Reaction of Methylenecyclobutanes with NXS-H<sub>2</sub>O System
作者:Lei Yu、Lingfeng Ren、Bei Xu、Rong Guo
DOI:10.1080/00397911.2010.517614
日期:2011.11.1
Abstract Reactions of methylenecyclobutanes (MCBs) with NXS-H2O system were investigated. The results were quite different from that of methylenecyclopropanes (MCPs), and an interesting aryl-transfer reaction happened to give substituted cyclobutyl ketones as products when disubstituted MCBs were employed. When monosubstituted MCBs were employed, the direct halohydroxylation gave the cyclobutyl ring
Orthogonal Synthesis of Isoindole and Isoquinoline Derivatives from Organic Azides
作者:Benjamin Wei-Qiang Hui、Shunsuke Chiba
DOI:10.1021/ol802816k
日期:2009.2.5
alpha-Azido carbonyl compounds bearing a 2-alkenylaryl moiety at the alpha-position are found to be promising precursors for synthesis of isoindole and isoquinoline derivatives via 1,3-dipolar cycloaddition of azides onto alkenes and 6 pi-electrocyclization of N-H imine intermediates, respectively.
Cerium(IV) Ammonium Nitrate–Mediated Oxidation of Mono-aryl-substituted Methylenecyclobutanes: A Convenient Method for the Synthesis of Spirocyclobutyl-1,2-dioxethanes
作者:Lei Yu、Lingfeng Ren、Rong Yi、Rong Guo
DOI:10.1080/00397911.2010.505705
日期:2011.9.1
Cerium(IV) ammonium nitrate (CAN)-mediated oxidation of methylenecyclobutanes was investigated. Compared with the similar reactions of methylenecyclopropanes, the reaction products were quite different. Instead of the desired ring-enlarged product cyclopentanones, a cyclobutyl ring-intact product, spirocyclobutyl-1,2-dioxethane, was obtained. The structures of these spiroheterocycle-containing compounds are interesting, and the reactions are potentially valuable in both organic synthesis and mechanism research.