Inter- and intramolecular reactions of 1-deoxy-1-thio-1,6-anhydrosugars with α-diazoesters: synthesis of the tagetitoxin core by photochemical ylide rearrangement
作者:Anne J. Price Mortimer、Julien R. H. Plet、Oluwafunsho A. Obasanjo、Nikolas Kaltsoyannis、Michael J. Porter
DOI:10.1039/c2ob26308d
日期:——
intermediacy of sulfur ylides, has been proposed as a route for the synthesis of the tagetitoxin skeleton. Intermolecular reactions of such thioanhydrosugars with diazoesters afford a range of undesired products derived from the initially formed ylide, whereas use of an intramolecular process generates stable ylides which can be converted to the tagetitoxin skeleton by photo-Stevens rearrangement. Computational
已经提出了由金属卡宾介导并通过硫酰化物的中间进行的1-脱氧-1-硫代-1,6-脱水糖的单碳环膨胀,作为合成塔格毒素框架的途径。此类硫代脱水糖与重氮酸酯的分子间反应提供了一系列源自最初形成的叶立德的不希望有的产物,而使用分子内过程会生成稳定的叶立德,这些叶立德可以通过光-史蒂文斯重排而转化为塔格毒素框架。使用密度泛函理论的计算研究表明,光化学重排可能通过均相-重组途径进行。