Highly stereocontrolled total synthesis of the polyether antibiotic salinomycin. I. Synthesis of the left (C1-C9) and middle (C10-C17) segments from D-glucose.
作者:Kiyoshi HORITA、Yuji OIKAWA、Osamu YONEMITSU
DOI:10.1248/cpb.37.1698
日期:——
The required left (C1-C9) segment, (R)-2-[(2R, 5S, 6R)-6-[(R)-1-formylethyl]-5-methyltetrahydropyran-2-yl]butanoic acid, for a total synthesis of salinomycin was highly stereoselectively synthesized from D-glucose via a chelation-controlled Grignard reaction and a decarbonylation with Wilkinson's catalyst as important steps. The stereoselective synthesis of the middle (C10-C17) segment, (2R, 4S, 5S, 6R)-6-ethyl-2, 4-dimethyl-7-oxononan-5-olide, starting from D-glucose is also described.
以 D-葡萄糖为原料,通过螯合控制的格氏反应和以威尔金森催化剂为重要步骤的脱羰基反应,高度立体选择性地合成了盐霉素全合成所需的左侧(C1-C9)段--(R)-2-[(2R, 5S, 6R)-6-[(R)-1-甲酰基乙基]-5-甲基四氢吡喃-2-基]丁酸。此外,还介绍了从 D-葡萄糖开始立体选择性合成中间(C10-C17)段 (2R, 4S, 5S, 6R)-6-ethyl-2, 4-dimethyl-7-oxonan-5-olide 的过程。