- 著者
- 松田 彰 南川 典昭 佐々木 琢磨 上田 亨
- 出版者
- 公益社団法人 日本薬学会
- 雑誌
- CHEMICAL & PHARMACEUTICAL BULLETIN (ISSN:00092363)
- 巻号頁・発行日
- vol.36, no.7, pp.2730-2733, 1988
- 被引用文献数
- 32
The design, synthesis and antileukemic activity of 5-alkynel-1-β-D-ribofuranosylimidazole-4-carboxamides (6) are described. The cross-coupling reaction of 5-iodo-1-(2, 3, 5-tri-O-acetyl-β-D-ribofuranosyl)imidazole-4-carboxamide (8) with various terminal alkynes in the persence of bis(benzonitrile)palladium dichloride and triethylamine in acetonitrile gave 5-alkylnyl derivatives (9) in high yields. Coupling of 8 with (trimethylsilyl)acetylene gave hte undesired dimer (10). Instead of (trimethylsilyl)acetylene, treatment of trimethyl[(tributyl-satannyl)ethynyl]silane with 8 in the absence of triethylamine produced the desired 5-[2-(trimethylsilyl)ethynyl] derivative (9f) in 77% yield. Deblocking of these nucleosides (9) gave the target nucleosides (6a-f). Among them, 5-ethynyl-1-β-D-ribofuranosylimidazole-4-carboxyamide (6f) is the most potent inhibitor of the growth of murine L1210 cells in vitro (IC<SUB>50</SUB>=0.18 μg/ml).
- 著者
- 松田 彰 南川 典昭 佐々木 琢磨 上田 亨
- 出版者
- 公益社団法人日本薬学会
- 雑誌
- Chemical & pharmaceutical bulletin (ISSN:00092363)
- 巻号頁・発行日
- vol.36, no.7, pp.2730-2733, 1988-07-25
The design, synthesis and antileukemic activity of 5-alkynel-1-β-D-ribofuranosylimidazole-4-carboxamides (6) are described. The cross-coupling reaction of 5-iodo-1-(2,3,5-tri-O-acetyl-β-D-ribofuranosyl)imidazole-4-carboxamide (8) with various terminal alkynes in the persence of bis(benzonitrile)palladium dichloride and triethylamine in acetonitrile gave 5-alkylnyl derivatives (9) in high yields. Coupling of 8 with (trimethylsilyl)acetylene gave hte undesired dimer (10). Instead of (trimethylsilyl)acetylene, treatment of trimethyl[(tributyl-satannyl)ethynyl]silane with 8 in the absence of triethylamine produced the desired 5-[2-(trimethylsilyl)ethynyl] derivative (9f) in 77% yield. Deblocking of these nucleosides (9) gave the target nucleosides (6a-f). Among them, 5-ethynyl-1-β-D-ribofuranosylimidazole-4-carboxyamide (6f) is the most potent inhibitor of the growth of murine L1210 cells in vitro (IC_<50>=0.18 μg/ml).