Preparation of methyl 2,3-di-O-mesyl-4,6-thioanhydro-α-d-galactopyranoside and methyl 2-O-mesyl-4,6-thioanhydro-α-d-gulopyranoside
作者:Gunadi Adiwidjaja、Jörg-Stephan Brunck、Kerstin Polchow、Jürgen Voss
DOI:10.1016/s0008-6215(00)00009-4
日期:2000.5
4 and 10, with the d -galacto and d -gulo configuration, respectively, were obtained from methyl α- d -glucopyranoside. The thietane cyclization involved a thio-Mitsunobu reaction resulting in a 6-thioacetate, which underwent selective base-catalyzed intramolecular nucleophilic substitution at a C-4 mesylate. The structureS of 4 and 10 were elucidated by X-ray diffraction analysis.
摘要从甲基α-d-吡喃葡萄糖苷中获得了两个分别为d-半乳糖和d-gulo构型的2-oxa-7-噻二环[4.2.0]辛烷衍生物4和10。硫杂环丁烷环化涉及硫代-Mitsunobu反应,产生6-硫代乙酸酯,该酯在C-4甲磺酸酯上进行了选择性碱催化的分子内亲核取代。通过X射线衍射分析阐明了4和10的结构。