Tripodal Phosphane Ligands with Novel Linker Units and Their Rhodium Complexes as Building Blocks for Dendrimer Catalysts
作者:Ralf A. Findeis、Lutz H. Gade
DOI:10.1002/ejic.200390019
日期:2003.1
Si(CH2)3SiMe2Cl}4 “G[0]-[Cl]4” (12) and its first generation analogue Si[(CH2)3SiMe(CH2)3SiMe2Cl}2]4 “G[1]-[Cl]8” (15) were reacted with, respectively, four and eight molar equivalents of the lithium alkoxy derivative of 9 giving the two functionalized dendrimers G[0]-[OCH2CH2Otriphos]4 (13) and G[1]-[OCH2CH2Otriphos]8 (16). These were metallated with four and eight molar equivalents of [Rh(COD)2][BF4] in CH2Cl2
已经开发了一种用于三足磷烷配体的骨架官能化的有效策略,该策略允许其连接到固体支持物和聚合物上。使用季戊四醇 (1) 作为起始材料,在四步合成中以良好的收率获得了官能化的磷烷三脚架 HOCH2CH2OCH2C(CH2PPh2)3 (9)。9 与 [Mo(CO)3(MeCN)3] 和 [Rh(COD)2][A] 反应得到复合物 [HOCH2CH2OCH2C(CH2PPh2)3}Mo(CO)3] (10) 和 [HOCH2CH2OCH2C (CH2PPh2)3}Rh(COD)][A] (A = BF4: 11a, PF6: 11b),其中两个通过 X 射线衍射表征。碳硅烷树枝状聚合物 Si(CH2)3SiMe2Cl}4 “G[0]-[Cl]4” (12) 及其第一代类似物 Si[(CH2)3SiMe(CH2)3SiMe2Cl}2]4 “G[1] -[Cl]8” (15) 分别与 4 和 8