Side-chain analogues of 20-hydroxyecdysone 1 and ecdysone 2
containing a tetrahydrofuran ring, including shidasterone 4, have been
prepared and assessed for biological activity using a bioassay derived
from a tumorous B
II
blood cell line of Drosophila
melanogaster. The synthetic strategy involves selective protection
of the 2,3-cis-diol of 1 and 2 followed by activation of the
C-22 hydroxy group prior to ring-closure.
含有
四氢呋喃环的20-羟基
蜕皮激素1和
蜕皮激素2的侧链类似物,包括shidasterone 4,已被制备并通过源自果蝇黑腹果蝇B-II血液肿瘤
细胞系的
生物测定法评估其
生物活性。合成策略涉及对1和2的2,3-顺式二醇的选择性保护,随后在环合前活化C-22羟基。