Carbogallation of Alkynes Using Gallium Tribromide and Silyl Ketene Acetals and Synthetic Application to Cross-Coupling with Aryl Iodides
作者:Yoshihiro Nishimoto、Hiroki Ueda、Makoto Yasuda、Akio Baba
DOI:10.1002/chem.201102255
日期:2011.9.26
Try substituted alkynes with GaBr3: The regio‐ and stereoselective carbogallation of alkynes has been achieved by a simple treatment of GaBr3, alkynes, and ketene silyl acetals. The produced alkenylgallium compounds can be used for the synthesis of selective trisubstituted alkenes through successive cross‐coupling with aryliodides (see scheme). The usability of the carbogallation was presented by the
尝试用GaBr 3取代炔烃:通过对GaBr 3,炔烃和乙烯酮甲硅烷基缩醛的简单处理,实现了炔烃的区域和立体选择性碳氢化。产生的烯基镓化合物可通过与芳基碘化物的连续交叉偶联而用于合成选择性三取代的烯烃(参见方案)。通过从海草Cymodocea nodosa提取的甲肾上腺素的nodosol的全合成,可以显示出碳糖化的可用性。