Two efficient, metal free reagent systems, PhI(OAc)₂-I₂ (method A) and IBX-I₂ (method B), for stereoselective synthesis of trans-2-deoxy-2-iodoglycosylacetates and O-iodobenzoates respectively from differently protected glycals have been developed. They are compatible with a variety of protecting groups and various functional groups at 2C-position. Hexose-3,2-enolone 8 is obtained directly from 2-acetoxy glycal 5 by method A. An application to modified method B has been shown by synthesis of a diastereomerically pure α-glycosyl ortho-hexynylbenzoate 12, a glycosyl donor from 3,4,6-tri-O-acetyl-D-glucal in two steps that has been further utilized in the synthesis of glycosides 13–18.

两种有效的无金属试剂系统PhI（OAc）₂ -I ₂（方法A）和IBX-I ₂（方法B），分别用于立体选择性地合成反式-2-脱氧-2-碘代糖基乙酸酯和O-碘代苯甲酸酯已经开发了保护的糖基。它们在2 C位与各种保护基和各种官能团相容。通过方法A直接从2-乙酰氧基乙二醇5获得己糖3,2-烯醇酮8。通过合成非对映体纯的α-糖基邻-己炔基苯甲酸酯12显示了对改良方法B的应用。从3,4,6-三糖供体ö乙酰基d-己烯糖在已在糖苷的合成被进一步利用两个步骤13 - 18。