Facile Preparation of 1,6-Anhydro-2-azido-3-<i>O</i>-benzyl-2-deoxy-<i>β</i>-D-glucopyranose and Its 4-<i>O</i>-Substituted Derivatives
作者:Nobuo Sakairi、Shunya Takahashi、Feng Wang、Yoshihito Ueno、Hiroyoshi Kuzuhara
DOI:10.1246/bcsj.67.1756
日期:1994.6
6-anhydro-2,3-O-endo-benzylidene-β-D-mannopyranose derivatives with trimethylamine–borane (1/1)–aluminium chloride resulted in highly regioselective fission of the cyclic acetals to give the corresponding 2-O-unprotected-3-O-benzyl derivatives. Trifluoromethanesulfonylation of these, followed by nucleophilic substitution, afforded 2-azido-2-deoxy derivatives in good yields.
用三甲胺-硼烷 (1/1)-氯化铝处理 1,6-脱水-2,3-O-内亚苄基-β-D-吡喃甘露糖衍生物导致环状缩醛的高度区域选择性裂变,得到相应的 2 -O-未保护的-3-O-苄基衍生物。这些的三氟甲磺酰化,然后是亲核取代,以良好的产率提供 2-叠氮基-2-脱氧衍生物。