Rearrangement of Homoallylic Alcohols with Thallium(III): Diastereoselective Synthesis of Indans Bearing a β-Hydroxy Ketone Moiety
作者:Luiz Silva、Samir Quintiliano、Marcus Craveiro、Fabiana Vieira、Helena Ferraz
DOI:10.1055/s-2006-958976
日期:2007.2
through a thallium(III)-mediated ring contraction reaction of 1,2-dihydronaphthalene derivatives bearing suitably positioned primary and secondary hydroxyl groups are disclosed. The relative configuration of 3-(2,3-dihydro-1 1H-inden-3-yl)-2-methyl-3-oxopropyl 4-bromobenzoate was assigned by X-ray crystal structure analysis, allowing additional insights into the mechanism of the thallium(III)-promoted
公开了通过铊(III)介导的带有适当定位的伯羟基和仲羟基的1,2-二氢萘衍生物的环收缩反应合成茚满的几个方面。通过 X 射线晶体结构分析确定了 3-(2,3-dihydro-1 1H-inden-3-yl)-2-methyl-3-oxopropyl 4-bromobenzoate 的相对构型,从而进一步深入了解铊(III)促进高烯丙醇的氧化重排。使用过量的三硝酸铊 (TTN),带有吸电子基团溴的伯高烯丙醇的反应以 52-55% 的产率产生茚满。此外,仲高烯丙醇的铊(III)介导的氧化重排以非对映选择性的方式产生具有多达三个立体中心的茚满。