Synthesis of Vinyl Sulfoxide-Modified Pent-2-enofuranosides and Hex-2-enopyranosides and Preliminary Studies of Their Reactivity
作者:Ananta Kumar Atta、Debanjana Dey、Atanu Bhaumik、Chinmoy Manna、Tarun K. Pal、Tanmaya Pathak
DOI:10.1002/ejoc.201200637
日期:2012.9
Vinyl sulfoxide-modified pent-2-enofuranosides and hex-2-enopyranosides have been synthesized by using a controlled oxidation of C-3-deoxy-C-3-thioaryl furanosides and pyranosides, respectively, followed by mesylation of the C-2-hydroxyl group and elimination. In the furanose system, both diastereomers were formed in almost equal ratio, whereas the pyranose ring imposed diastereoselectivity of oxidation
通过分别使用 C-3-脱氧-C-3-硫代芳基呋喃糖苷和吡喃糖苷的受控氧化,然后将 C-2- 甲磺酰化,合成了乙烯基亚砜修饰的 pent-2-enofuranosides 和 hex-2-enopyranosides羟基和消除。在呋喃糖系统中,两种非对映异构体以几乎相等的比例形成,而吡喃糖环强加了硫原子氧化的非对映选择性,以良好的总产率仅产生 Ss 异构体。用 NaCH2NO2 处理乙烯基亚砜修饰的 2-enofuranosides 以获得 C-2 支链糖。呋喃糖基亚砜产生的产物类似于通过用硝基甲烷处理相应的砜获得的加合物。