【摘要】 在有机锆络合物（Cp₂ZrCl₂）存在下,取代烯丙基二甲基铝（A,B）可与一烷基或二烷基取代的炔烃发生加成反应。用盐酸处理加成中间体,生成1,4-戊二烯衍生物（1,2）、反应具有很高的立体选择性,几乎100%为同向加成,不发生烯丙基重排。取代烯丙基氯化锌（C,D）在无过渡金属络合物存在下,与炔烃发生加成反应,反应中,伴随完全的烯丙基重排。根据实验结果,对以上两类金属烯丙化反应的机理进行了讨论。更多还原

【Abstract】 It was found that substituted allylaluminiumreagents（A, B） add to both terminal and nonterminal alkynes inthe presence of zirconium complex（Cp₂ZrCl₂）. Treatment of theinitially formed intermediates with an acid gives Various kindsof pentadiene derivatives（1. 2）. The reactions are highly ster-eoselective and proceed exclusively by sny-addition withoutallylic rearrangement. Substituted allylzinc ?reagents?（C, D） add to functionalizedalkynes without the presence of any kinds of transition metalcomplexes. The reactions proceed with clean allylic rearrange-ment. The mechanismic aspects of the two allylmetallation reac-tions are discussed according to the experimental observations.更多还原