Efficient Preparative-Scale Procedures for the Pd-Catalyzed Methoxycarbonylation of Acetylenes
作者:S. F. Vasilevsky、B. A. Trofimov、A. G. Mal'kina、L. Brandsma
DOI:10.1080/00397919408012629
日期:1994.1
A number of acetylenic esters RC drop C-COOCH3 have been prepared in good yields on a preparative scale by Pd-catalyzed methoxycarbonylation of acetylenes RC drop CH.
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