1,3-Dipolar Cycloaddition of Chirally Modified Vinylboronic Ester with Nitrile Oxides
作者:Ao Zhang、Ying Kan、Gui-Ling Zhao、Biao Jiang
DOI:10.1016/s0040-4020(00)00017-x
日期:2000.2
Chiral modified vinylboronic ester 1, derived from d-(+)-mannitol, reacted with nitrile oxides to afford optically active isoxazolines. The regioselectivity was excellent and moderate stereoselectivity (up to 60% d.e.) was achieved. The configuration of new chiral centres in all the isoxazoline products was established by NMR analysis or X-ray analysis.
衍生自d-(+)-甘露醇的手性改性乙烯基硼酸酯1与腈氧化物反应,得到旋光的异恶唑啉。区域选择性极好,并实现了中等立体选择性(高达60%de)。通过NMR分析或X射线分析建立了所有异恶唑啉产品中新的手性中心的构型。