Functionalized Ether Derivatives of HOCH2C(CH2PPh2)3 and Related Tripod Ligands – Synthesis and Coordination Chemistry
作者:Peter Schober、Rainer Soltek、Gottfried Huttner、Laszlo Zsolnai、Katja Heinze
DOI:10.1002/(sici)1099-0682(199810)1998:10<1407::aid-ejic1407>3.0.co;2-j
日期:1998.10
backbone of the ligands is greatly reduced by fixing three arms of the neopentane scaffolding to the metal center. After deprotonation, reaction with electrophiles will produce the corresponding ether derivatives ROCH2C(CH2PPh2)(CH2Z)2 (3). Mesylation of 2 leads to MeSO2OCH2C(CH2PPh2)3·Mo(CO)3 (4), which reacts with alkoxides to produce 3 in a sequence of reversed polarity. Ligands 5 [ROCH2C(CH2PPh2)3] are
新戊烷衍生的一般类型 HOCH2C(CH2PPh2)(CH2Y)(CH2Z) (1; Y, Z = PPh2, SR) 的三脚架配体在其羟基上具有抗醚形成的能力。已发现两种途径,允许将 1 转化为醚官能化三脚架配体 ROCH2C(CH2PPh2)(CH2Y)(CH2Z)(Y = Z = PPh2: 5,Y = Z = SR: 8)。这些策略之一依赖于 1·Mo(CO)3 (2) 中 1 的 η3 配位。通过这种方式,通过将新戊烷支架的三个臂固定到金属中心,可以有效地保护供体基团,并大大减少了配体骨架上 CH2OH 基团的空间阻碍。去质子化后,与亲电试剂反应会产生相应的醚衍生物 ROCH2C(CH2PPh2)(CH2Z)2 (3)。2 的甲磺酰化导致 MeSO2OCH2C(CH2PPh2)3·Mo(CO)3 (4),与醇盐反应生成极性相反的 3。配体 5 [ROCH2C(CH2PPh2)3]