Stereoselective Synthesis of Some 3-Nitroglucopyranosyladenine Analogues via a Nitroolefin: Intermediate as Potential Therapeutic Agents
作者:Kazunari TSUBOIKE、Katsumaro MINAMOTO、Gen MIZUNO、Kazufumi YANAGIHARA
DOI:10.1080/07328319808004672
日期:1998.4
Three isomers of 9-(4,6-O-benzylidene-3-deoxy-beta-D-hexopyranosyl) adenines (2-4) were isolated. The manno isomer 2 could be isomerized to the gluco isomer 3. The manno (2) and galacto isomer (4) were deprotected to 5 and 7, respectively. Michael addition of some organic amines and thiolates to the nitroolefin intermediate (8) gave the corresponding 2-(substituted)-3-nitro-glucopyranosides (9a-h). Compounds 9a,c,h were deprotected to l0a,c,h. Sodium azide with 8 gave the triazolo nucleoside 11, which was deprotected to 12. 2-Deoxy-3-nitro analogue 14 was also obtained.