Synthesis and reactions of methyl (trimethylsilylmethyl)-acetylenecar☐ylate. A general method for the generation of di-exo-methyleneisoxazolines and novel access to fused isoxazoles
作者:Makoto Hojo、Kyoji Tomita、Akira Hosomi
DOI:10.1016/0040-4039(93)85108-9
日期:1993.1
Methyl (trimethylsilylmethyl)acetylenecar☐ylate, which is a common key compound in preparation of precursors for di-exo-methylene derivatives of isoxazolines, reacts with nitrile oxides to yield cycloadducts, isoxazoles. Reduction and acetylation of cycloadducts leading to 4-acetoxy methyl-5-(trimethylsilylmethyl)isoxazoles followed by flouride ion-promoted 1,4-elimination reaction in the presence
(三甲基甲硅烷基甲基)乙炔基甲酸甲酯是制备异恶唑啉二-exo-亚甲基衍生物前体的常用关键化合物,它与腈氧化物反应生成环加合物,即异恶唑。环加合物的还原和乙酰化导致4-乙酰氧基甲基-5-(三甲基甲硅烷基甲基)异恶唑,然后在亲二烯体的存在下进行氟离子促进的1,4-消除反应,得到稠合的异恶唑。