Oxaferrocene Cryptands as Efficient Molecular Switches for Alkali and Alkaline Earth Metal Ions
作者:Herbert Plenio、Clemens Aberle
DOI:10.1021/om970681f
日期:1997.12.1
excellent yields. Using 1-chloro-2-tosylethane results in 1,1‘-bis(2-chloroethoxy)-3,3‘,4,4‘-tetraphenylferrocene which was converted into 1,1‘-bis-(2-iodoethoxy)-3,3‘,4,4‘-tetraphenylferrocene in 89% yield, to be finally reacted with diaza-crown ethers (diaza-12-C-4, diaza-15-C-5, diaza-18-C-6). In this manner the respective ferrocene cryptands 23, 24, and 25 were generated as the 1 + 1 products in yields
3,4-二苯基环戊-2-烯-1-酮,环戊-2-烯-1-酮,3,4-二甲基环戊-2-烯-1-酮和2,3,4,5-的反应具有各种三烷基甲硅烷基三氟甲磺酸酯(SiR 3 = SiMe 3,SiEt 3,SiMe 2 t Bu,Si i Pr 3)的四甲基环戊-2-en-1-one导致以实际上定量的产率形成各个环戊二烯基甲硅烷基醚。这些环戊二烯与n- BuLi和FeCl 2的反应以48-57%的产率得到相应的取代的二茂铁基三烷基甲硅烷基醚,这是通过适当的裂解方案生成的羟基二茂铁的合成当量:SiMe 3保护的二茂铁醇(CH 3 CN + 10%H 2 O + Na 2 CO 3);SiEt 3(CH 3 CN + 10%H 2 O + Na 2 CO 3 + NaF); 和SiMe 2 t Bu保护(CH 3中的NBu 4 F·3H 2 OCN)。在碳亲电试剂的存在下进行脱保护导致以优异的产率得到各