Chiral synthesis of polyketide-derived natural products. Part 5. Synthesis of a chiral segment corresponding to the C-1—C-5 unit of erythromycin A from<scp>D</scp>-glucose
作者:Yuji Oikawa、Takao Nishi、Osamu Yonemitsu
DOI:10.1039/p19850000019
日期:——
As a right-hand segment with three consecutive chiral centres corresponding to the C-1—C-5 unit of erythromycin A (1), (2S,3R,4S)-3,5-isopropylidenedioxy-2,4-dimethylpentanal (32) was synthesized from D-glucose (5) by application of MPM (4-methoxybenzyl) protection for an hydroxy function and some fairly stereoselective reactions, hydroboration and hydrogenation.
作为右侧部分,具有三个连续的手性中心,分别对应于红霉素A(1),(2 S,3 R,4 S)-3,5-异丙基二烯基-2,4-的C-1–C-5单元通过应用MPM(4-甲氧基苄基)保护羟基功能和一些相当立体选择性的反应,硼氢化和氢化反应,由D-葡萄糖(5)合成了二甲基戊醛(32)。