The key problem is to synthesize high stereoselectively trans- 2,5- disubstituted tetrahydrofurans.
高立体选择性合成反式-2，5-二取代四氢呋喃是期待解决的关键问题。
2
Conclusion The 3, 5-dinitrobenzoyl group was found to be a good leaving group at the anomeric position and O-glucopyranosides and oligosaccharides were stereoselectively synthesized in good yield.