作者:Masaya Nakata、Masayuki Arai、Katsuhiko Tomooka、Naoki Ohsawa、Mitsuhiro Kinoshita
DOI:10.1246/bcsj.62.2618
日期:1989.8
The enantiospecific total synthesis of erythronolide A (1) through (9S)-9-deoxo-9-hydroxyerythronolide A (2) from the chiral C1–C6, C7–C9, and C10–C13 synthetic segments is described. The C10–C13 segment, (3R,4R,5R)-5-O-benzyl-2-iodo-3,4-O-isopropylidene-4-methyl-1-heptene-3,4,5-triol (11) was synthesized in 16 steps and an 8.3% overall yield from D-ribose. The C7–C9 segment, (S)-(+)-2-(2-bromo-1-methylethyl)-1
描述了来自手性 C1–C6、C7–C9 和 C10–C13 合成片段的 erythronolide A (1) 到 (9S)-9-deoxo-9-hydroxyerythronolide A (2) 的对映特异性全合成。C10–C13 链段,(3R,4R,5R)-5-O-benzyl-2-iodo-3,4-O-isopropylidene-4-methyl-1-heptene-3,4,5-triol (11)由 16 个步骤合成,D-核糖的总产率为 8.3%。C7–C9 链段 (S)-(+)-2-(2-bromo-1-methylethyl)-1,3-dioxolane (47) 由甲基 (S)-(+)-3-hydroxy- 2-甲基丙酸酯分 8 个步骤,总产率为 49%。由镁和 47 制备的格氏试剂与 C1-C6 链段、3,5,7-tri-O-benzyl-1,4,6-trideoxy-4