Trimethylsilyl trifluoromethanesulfonate-promoted cycloaddition of nitrones with silyl enol ethers: synthesis and reactivity of 5-siloxyisoxazohdines
作者:Chiara Camiletti、Dilip D. Dhavale、Luca Gentiluccia、Claudio Trombini
DOI:10.1039/p19930003157
日期:——
In the presence of trimethylsilyl trifluoromethanesulfonate (TMSOTf), the reaction of nitrones with silyl enol ethers affords 5-siloxyisoxazolidines under mild conditions, in good to excellent yields. 5-Siloxyisoxazolidines can undergo chemoselective reductions to Manoich bases or N-hydroxy-1,3-amino alcohols, and, in the presence of TMSOTf, react with silylated carbon nucleophiles at the acetalic
在三甲基甲硅烷基三氟甲磺酸酯(TMSOTf)的存在下,硝酮与甲硅烷基烯醇醚的反应在温和条件下以良好或优异的收率提供了5-甲硅烷氧基异恶唑烷。5-Siloxyisoxazolidines可以进行化学选择性还原成Manoich碱或N-羟基-1,3-氨基醇,并且在TMSOTf存在下,与甲硅烷基化碳亲核试剂在乙缩醛C-5碳上反应,生成例如5-烯丙基和5-氰基异恶唑烷。