Nickel(0)-catalyzed disilylative and silastannylative cyclizations of 1,3-diene and tethered aldehyde
作者:Nozomi Saito、Miwako Mori、Yoshihiro Sato
DOI:10.1016/j.jorganchem.2006.03.047
日期:2007.1
Nickel(0)-catalyzed bismetallative cyclization of 1,3-diene and a tethered aldehyde in the presence of PhF2SiSiMe3 or Me3SiSnBu3 gave the corresponding cyclized product having an allylsilyl or an allylstannyl unit in the side chain in good yields. The cyclized product obtained from the reaction in the presence of Me3SiSnBu3 had reactivity as an allylstannane derivative, and the coupling reaction with
在PhF 2 SiSiMe 3或Me 3 SiSnBu 3的存在下,镍(0)催化1,3-二烯和系留醛的双金属环化反应,在侧链上具有烯丙基甲硅烷基或烯丙基锡烷基单元的相应环化产物收率高。在Me 3 SiSnBu 3存在下从反应中获得的环化产物具有作为烯丙基锡烷衍生物的反应性,并且与苯甲醛的偶联反应以非对映选择性的方式进行。当在手性单齿膦配体的存在下进行甲硅烷基化环化时,环化产物以适度对映体过量的旋光形式产生。