A Barbier-type propargylation of aldehydes with (3-bromoprop-1-ynyl)trimethylsilane has been achieved using reactive barium as a low-valent metal in THF. This process is effective also for obtaining the desired homopropargylic alcohols in high yields from the corresponding ketones including enolizable ketones such as cyclopent-2-enone.
                                    在 THF 中使用活性
钡作为低价
金属,实现了醛与 (3-bromoprop-1-ynyl)trimethylsilane 的巴比尔式
丙炔化反应。该工艺还能有效地从相应的
酮类(包括环戊-2-烯酮等可烯化的
酮类)中高产率地获得所需的均
丙炔醇。