Synthesis of All Configurational Isomers of 1,6-Anhydro-2,3,4-trideoxy-2,3-epimino-4-fluoro-β-<scp>d</scp>-hexopyranoses
作者:Jindřich Karban、Jan Sýkora、Jiří Kroutil、Ivana Císařová、Zdeňka Padělková、Miloš Buděšínský
DOI:10.1021/jo1000912
日期:2010.5.21
C-4 hydroxyl with DAST and subsequent LiAlH4 reduction. Nucleophilic displacement of the hydroxyl activated by DAST proceeded without rearrangement and with moderate to good yields. A convenient synthesis of d-mannoepimine from a readily available 3-benzylamino derivative was also developed.
我们制备了全系列的1,6-脱水-2,3,4-三苯氧基-4-氟-2,3-表胺基-β- d-己基吡喃糖。关键步骤是将具有游离C-4羟基的叠氮基磺酸盐与DAST反应,然后还原LiAlH 4。DAST活化的羟基的亲核置换反应无需重排即可进行,且收率中等至良好。还开发了从容易获得的3-苄基氨基衍生物方便地合成d-甘露烯嘧啶的方法。