作者:Herbert Lehmkuhl、Ingo Döring、Raymond McLane、H. Nehl
DOI:10.1016/s0022-328x(00)81022-0
日期:1981.11
The Dialk-2-enyl zinc compounds II, XI–XIV can be prepared via reaction of ZnCl2 with the corresponding alk-2-enylmagnesium halides I, VII–X at 20–35°C in ether in 68–94% yield. Diprop-2-enylzinc (II) oligomerizes into 2-allylpropane-1,3-diylzinc (III) during attempted sublimation at 30–50°C. The yield of II decreases therefore to <15%. The oligomerization can be prevented by complexation of II with
Dialk-2-烯基锌化合物II,XI-XIV可以通过ZnCl 2与相应的烷基-2-烯基卤化镁I,VII-X在20-35°C下在乙醚中的反应制备,产率为68-94%。在试图在30–50°C升华过程中,二丙-2-烯基锌(II)会低聚为2-烯丙基丙烷-1,3-二基锌(III)。因此,II的产率降低至<15%。II与二恶烷的络合可防止低聚。在这种情况下,通过裂解二恶烷络合物可以以86%的产率获得II。