Novel rearrangement of N-enoyl oxazolidinethiones to N-substituted 1,3-thiazine-2,4-diones promoted by NbCl5
作者:Hector Hernández、Sylvain Bernès、Leticia Quintero、Estibaliz Sansinenea、Aurelio Ortiz
DOI:10.1016/j.tetlet.2005.12.019
日期:2006.2
NbCl5 has been employed as promoter of a novel rearrangement to afford chiral N-substituted 1,3-thiazine-2,4-diones with one or two new stereogenic centers from di- and trisubstituted N-enoyl oxazolidinethiones. The trisubstituted E-isomers provide the anti-diastereomers mainly.
NbCl 5已被用作新型重排的促进剂,以提供具有一个或两个来自二和三取代的N-烯酰基恶唑烷硫酮的新的立体异构中心的手性N-取代的1,3-噻嗪-2,4-二酮。三取代的E-异构体主要提供抗-非对映异构体。