Synthesis of Disilacycloalkenes by Ruthenium Alkylidene Catalyzed Ring-Closing Metathesis (RCM) Reaction of<b><i>α</i></b>,<b><i>ω</i></b>-Bis(allyldimethylsilyl)-Substituted Compounds
作者:Takashi Hoshi、Hiroyuki Yasuda、Takanobu Sanji、Hideki Sakurai
DOI:10.1246/bcsj.72.821
日期:1999.4
Ruthenium-catalyzed ring-closing metathesis (RCM) reactions of various α,ω-bis(allyldimethylsilyl)-, bis(dimethylvinylsilyl)-, and bis(dimethylvinyloxysilyl)-substituted compounds are examined. The steric and electronic influences of the substrates on the RCM reaction were discussed. Although the successful ring-closing reactions are limited to seven- and eight-membered rings, disilacycloalkene derivatives constructed with –SiMe2–CH2–SiMe2–, –SiMe2–(CH2)2–SiMe2–, –SiMe2–O–SiMe2–, –SiMe2–N(Ph)–SiMe2–, and a vinylene unit in the ring system were obtained in good to reasonable yields under the mild reaction conditions. The limitation of the reactions is mainly ascribed to Si–C and Si–Si bonds being longer than the C–C bond in the ring system.
研究了钌催化的各种 α、ω-双(烯丙基二甲基硅基)、双(二甲基乙烯基硅基)和双(二甲基乙烯基氧基硅基)取代化合物的闭环偏合成(RCM)反应。讨论了底物对 RCM 反应的立体和电子影响。虽然成功的闭环反应仅限于七元环和八元环,但在温和的反应条件下,以 -SiMe2-CH2-SiMe2-、-SiMe2-(CH2)2-SiMe2-、-SiMe2-O-SiMe2-、-SiMe2-N(Ph)-SiMe2- 和环系中的乙烯单元构建的二硅环烯衍生物也能以良好到合理的收率获得。反应的局限性主要归因于环系中的 Si-C 和 Si-Si 键比 C-C 键长。