Total Synthesis of a Macrocyclic Lactone Antibiotic A26771B and Its Isomers Using Carbohydrates
作者:Kuniaki Tatsuta、Yoshiya Amemiya、Yoshinobu Kanemura、Mitsuhiro Kinoshita
DOI:10.1246/bcsj.55.3248
日期:1982.10
Total synthesis and antibacterial activities of a macrocyclic lactone antibiotic A26771B (1) and all its isomers (2, 3, and 4) are discussed. The starting 8,9,10,12-tetra-O-benzyl-2,3,4,5,11-pentadeoxy-aldehydo-D-xylo-(E)-6-dcdecenose derived from D-glucose reacted with racemic Wittig reagent, (3-hydroxybutyl)triphenylphosphonium iodide to give 1,3,4,5-tetra-O-benzyl-2,8,9,10,11,14,16-heptadeoxy-D
讨论了大环内酯抗生素 A26771B (1) 及其所有异构体(2、3 和 4)的全合成和抗菌活性。源自 D-葡萄糖的起始 8,9,10,12-四-O-苄基-2,3,4,5,11-pentadeoxy-aldehydo-D-xylo-(E)-6-dcdecenose 与外消旋 Wittig 反应试剂,(3-羟基丁基)三苯基碘化鏻,得到 1,3,4,5-四-O-苄基-2,8,9,10,11,14,16-庚氧-DL-甘油-L-木-十六烷-6,12-二烯醇,其依次转化为甲基 15-O-乙酰-6,7,8,9,10,11,12,13,14,16-decadeoxy-4,5-O-isopropylidene- DL-glycero-L-threo-(E)-2-hexadecenonate (13) 通过有效的氧化和 β-消除。皂化后山口对 13 进行内酯化得到两种非对映异构 16 元环内酯,它们被转化为