Synthesis of <scp>d</scp>-Hexos-5-uloses by Novel in Situ Hydrolysis of Epoxides Derived from 6-Deoxyhex-5-enopyranosides
作者:Philomena M. Enright、Kathy M. O'Boyle、Paul V. Murphy
DOI:10.1021/ol006714w
日期:2000.11.1
see text] Epoxides derived from 2,3, 4-tri-O-protected-6-deoxyhex-5-enopyranosides are hydrolyzed in situ to ultimately give novel protected-D-hexos-5-ulose derivatives (sugar 1,5-dicarbonyls, 5-ketohexoses) in moderate to high yields. The products adopt a bicyclic structure (1,6-anhydropyranos-5-ulose) in solution with the pyranose ring in (4)C(1) conformation. The methodology has been used to prepare
[反应:请参阅文字]由2,3,4-三-O-保护的6-脱氧己基-5-烯吡喃糖苷衍生而来的环氧化物原位水解,最终得到新颖的保护的D-己糖5-蔗糖衍生物(糖1, 5-二羰基,5-酮己糖),产量中等至高。该产物在溶液中采用双环结构(1,6-脱水吡喃-5--5-糖),吡喃糖环呈(4)C(1)构型。该方法已用于制备D-木酮己糖5-蔗糖(5-酮葡萄糖),1-脱氧野oji霉素的合成前体以及肌醇生物合成中的可能中间体。