One-Pot Synthesis of Internal Conjugated (<i>Z</i>)-Enynyltrimethylsilanes Possessing Aryl, Cycloalkenyl, (<i>E</i>)- or (<i>Z</i>)-Alk-1-enyl Moieties on the sp Carbon Atom via Two Types of Cross-Coupling Reaction
作者:Masayuki Hoshi、Tomohiko Iizawa、Mitsuhiro Okimoto、Kazuya Shirakawa
DOI:10.1055/s-0028-1083201
日期:2008.11
and mild method for the stereospecitic synthesis of internal conjugated (Z)-enynyltrimethylsilanes whose conjugation is extended away from the distal alkynyl carbon atom. This protocol involves two types of cross-coupling reaction, a Suzuki-type reaction and a sila-Sonogashira reaction, and the desired synthesis can be performed in a one-pot manner. Thus, the copper-mediated cross-coupling reaction
本文描述了一种操作简单且温和的方法,用于立体定向合成内部共轭 (Z)-烯基三甲基硅烷,其共轭延伸远离末端炔基碳原子。该协议涉及两种类型的交叉偶联反应,铃木型反应和 sila-Sonogashira 反应,所需的合成可以一锅法进行。因此,二环己基[(Z)-1-(三甲基甲硅烷基)烷-1-烯基]硼烷与(三甲基甲硅烷基)乙炔基溴的铜介导的交叉偶联反应是在氢氧化锂水溶液存在下在-15°C下进行的。至室温,导致 (Z)-1,3-bis(trimethylsilyl)alk-3-en1-ynes 的立体定向形成。在不分离烯炔的情况下进行后续反应。因此,