Protecting-Group-Free Synthesis of 2-Deoxy-Aza-Sugars
作者:Emma Marie Dangerfield、Catherine Heather Plunkett、Bridget Louise Stocker、Mattie Simon Maria Timmer
DOI:10.3390/molecules14125298
日期:——
protecting-group-free asymmetric synthesis of 1,2,4-trideoxy-1,4-imino-L-xylitol is readily achieved in five steps from 2-deoxy-D-ribose and with an overall yield of 48%. Key in this synthesis is the application of our recently developed Vasella-reductive amination and carbamateannulationmethodologies to the synthesis of 2-deoxy-aza-sugars. The carbamateannulation occurred with excellent yield and
Total Synthesis of Cryptoconcatone D via Construction of 1,3-Diol Units Using Chiral Horner–Wittig Reagents
作者:Fabia Mittendorf、Ibrahim-Ethem Celik、Stefan F. Kirsch
DOI:10.1021/acs.joc.2c01737
日期:2022.11.4
modular synthesis of 1,3-polyols using a chiral phosphine oxide buildingblock is reported. This versatile buildingblock works in a repetitive way for the stereocontrolled synthesis of a tetraol key intermediate, which serves for the first total synthesis of the potentially anti-inflammatory natural product cryptoconcatone D. A new route toward the chiralbuildingblock is also presented: Starting from 2-deoxy-d-ribose
报道了使用手性氧化膦结构单元模块化合成 1,3-多元醇。这种多功能的结构单元以重复的方式用于四醇关键中间体的立体控制合成,它用于潜在抗炎天然产物隐连环酮 D 的首次全合成。还提出了通往手性结构单元的新途径:从 2-脱氧-d-核糖开始,经过优化的序列现在使构建块的使用再次对执业化学家更具吸引力。