Intramolecular cyclisation of (Z)-N-4-alkenylnitrones and the effects of alkenyl substituents
作者:William P. Hems、Choon-Hong Tan、Thomas Stork、Neil Feeder、Andrew B. Holmes
DOI:10.1016/s0040-4039(98)02617-3
日期:1999.2
The intramolecular 1,3-dipolar cycloaddition reactions of (Z)-N-4-alkenylnitrones carrying various alkenyl substituents were investigated, and the regiochemistry of the resulting isoxazolidines was determined. Silyl- and bromo-substituents were found to effect significant regiocontrol on the intramolecular nitrone dipolar cycloaddition reaction.
研究了带有各种烯基取代基的(Z)-N -4-烯基硝酮的分子内1,3-偶极环加成反应,并测定了所形成的异恶唑烷的区域化学性质。发现甲硅烷基和溴代取代基对分子内硝酮双极环加成反应具有显着的区域控制作用。