作者:Yves Auberson、Pierre Vogel
DOI:10.1016/s0040-4020(01)87887-x
日期:1990.1
obtained in 11 steps and 4.8 % overall yield with recovery of the chiral auxiliary ((1S)-camphanic acid) at an early stage of the synthesis. The method implies bromination of(-)-2-(tert-butyl) dimethylsilyl]oxy-5-exo6-exo-(isopropylidenedioxy)-7-oxabicyclo[2.2.1]hept-2-ene(-)-12) and its highly stereoselective transformation into (-)-benzyl (l23-O-triacetyl-5-azido-5-deoxy-ga- and β-D-allofuranosid)-uronate
从呋喃的Diels-Alder加合物16到1-氰基乙烯基(1S')-樟脑酸酯脱氧多恶菌素C(4)的起始步骤已分11步获得,总产率为4.8%,并回收了手性助剂((1S)-樟脑酸)在合成的早期阶段。该方法意味着将(-)-2-(叔丁基)二甲基甲硅烷基]氧基-5-exo6-exo-(异丙基二烯二氧基)-7-氧杂双环[2.2.1]庚-2-烯(-)- 12溴化并其高度立体选择性转化为(-)-苄基(123-O-三乙酰基-5-叠氮基5-脱氧-ga-和β-D-呋喃呋喃糖苷)-尿酸酯(9)。还介绍了用含氮部分对S-exo6-exo-(异丙基二烯二氧基)-7-氧杂双环[2.2.1]庚-2--2-((+-)- 11)中的C(3)进行立体选择性取代的程序。