Fragmentation of 6-Deoxy-6-halo-hexono-1,5-ortholactones: A Concerted, Nonstereospecific Process
作者:Bruno Bernet、Andrea Vasella
DOI:10.1002/hlca.19840670519
日期:1984.8.8
D-arabino- and D-ribo-ortholactones 13a–f and 15b–f and their treatment with Zn leading to the unsaturated esters 14a–d and 16a–d are described. Possible fragmentation mechanisms are discussed. The results were only compatible wit a concerted, nonsynchronous process, where both the axial lone pair of the ring oxygen atom and the lone pair formed during rupture of the C(5), O-bond participate in the elimination
描述了D-阿拉伯糖和D-核糖原内酯13a-f和15b-f的合成以及用锌处理导致不饱和酯14a-d和16a-d的方法。讨论了可能的碎片化机制。结果仅与协调一致的非同步过程相容,在该过程中,环氧原子的轴向孤对和C(5),O键断裂期间形成的孤对都参与了轴向和环的消除。赤道C(1)-烷氧基分别。