Gemcitabine analogues with 4-<i>N</i>-alkyl chain modified with fluoromethyl ketone group
作者:Cesar Gonzalez、Maria de Cabrera、Stanislaw F. Wnuk
DOI:10.1080/15257770.2018.1465186
日期:2018.4.3
the terminal double bond in the latter with OsO4/NMO afforded 4-N-(10,11-dihydroxyundecanyl) derivative. Regioselective sulfonation of primary hydroxyl followed by oxidation of secondary hydroxyl with Collin's reagent yielded desired β-keto sulfonate analogues 8 or 9. Subsequent displacement of the mesylate or tosylate group with KF in the presence of Kryptofix 2.2.2. or 18-crown-6 ether followed by
图形摘要摘要已探索了具有亲脂性 4-N-烷基链的吉西他滨类似物,该链带有一个末端 β-酮磺酸盐部分,适用于与 18F-放射性标记相容的氟化。用 1-amino-10-undecene 置换受保护的 4-N-tosylgemcitabine 中的对甲苯磺酰氨基得到 4-N-(10-undecenyl)-3',5'-di-O-benzoyl-2'-deoxy-2' ,2'-二氟胞苷。后者中的末端双键用 OsO4/NMO 氧化得到 4-N-(10,11-二羟基十一烷基)衍生物。伯羟基的区域选择性磺化,然后用柯林试剂氧化仲羟基,产生所需的 β-酮磺酸盐类似物 8 或 9。随后在 Kryptofix 2.2.2 存在下用 KF 置换甲磺酸盐或甲苯磺酸盐基团。