Iodosobenzene diacetate-Iodine and IBX-Iodine: Reagent systems for the synthesis of diastereomerically enriched 2-deoxy-2-iodoglycosyl acetates and 2-deoxy-2-iodoglycosyl ortho-iodobenzoates from protected glycals
作者:Puli Saidhareddy、Sama Ajay、Arun K. Shaw
DOI:10.1016/j.tet.2017.06.001
日期:2017.7
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
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。