2-O-Acetyl-3,5-dideoxy-3-trifluoracetamido-D-ribofuranosyl bromide, prepared by an improved 10-step synthesis from 1,2-isopropylidene-D-xylofuranose, was coupled under Koenigs–Knorr glycosidation conditions with a side-chain protected aglycone derivative of the antitumor antibiotic adriamycin. Complete removal of the blocking groups from the anomeric coupling products afforded glycoside ring-contracted
2-O-Acetyl-3,5-dideoxy-3-trifluoracetamido-D-ribofuranosyl bromide,由 1,2-isopropylidene-D-xylofuranose 改进的 10 步合成制备,在 Koenigs-Knorr 糖苷化条件下与抗肿瘤抗生素
阿霉素的侧链保护糖苷配基衍
生物。从异头偶联产物中完全去除封闭基团,得到
阿霉素的糖苷环收缩类似物。选择性去除封闭基团产生了
N-三氟乙酰基阿霉素-1
4-戊酸 (AD 32) 的类似物,这是一种具有临床活性和毒性降低的
阿霉素的非 DNA 结合类似物。耦合产物的异头分配源自与 Karplus 方程考虑一致的 nmr 光谱数据。对许多目标化合物进行了体外生长抑制和 DNA 结合试验。