Stereoselective synthesis of β-oxy- and α-methylene-γ-butyrolactones on pyranose templates
作者:Yousef Al-Abed、Taleb H. Al-Tel、Wolfgang Voelter
DOI:10.1016/0040-4020(93)80016-m
日期:1993.1
Reaction of sugar derived epoxy triflates 1 and 2 or epoxy ketoses 11 and 12 with ester or acid enolates followed by acid-catalyzed ring closure affords poly-substituted chiral butenolides in excellent yields.
A new strategy for carbohydrate-based syntheses of oxaspiro-multichiral systems: An alternative route to pyranosidic homologation
作者:Taleb H Al-Tel、Raed A Al-Qawasmeh、Thomas Kaiser、Wolfgang Voelter
DOI:10.1016/0040-4039(95)00843-2
日期:1995.6
A newstrategy for the syntheses of polyfunctionalized oxaspiro variants using furan and the keto sugars 1 and 6 is described. Also, the resulting satellite ring represents an alternative route to homologated pyranosides.