T. Seitz et al., FUNCTIONALIZED TRIPOD-LIGANDS WITH NEOPENTANE FRAMEWORK - REACTION OFHOCH2C(CH(2)PR(2))(3) WITH ELECTROPHILES, Zeitschrift fur Naturforschung. B, A journal of chemical sciences, 50(9), 1995, pp. 1287-1306
Several ways to functionalize hydroxy-tripod-ligands (HOCH2C(CH(2)PR(2
))(3)) by activation with electrophiles are presented. The use of carb
oxylic halides and anhydrides is shown to be generally successful for
esterification reactions in a one-pot synthesis starting from the oxet
anes O(CH2)(2)C(CH(2)PR(2))(2). Facial coordinaton of the related eate
rs towards iron(II) and molybdenum(0) can be achieved depending on the
nature of the phosphane donor groups. If methyliodide or trimethylsil
ylchloride are used as electrophiles in order to functionalize the hyd
roxy group in HOCH2C(CH(2)PR(2))(3), it is necessary to proctect the p
hosphane groups by formation of the tris-borane adduct. All new compou
nds have been fully characterized by the usual analytical techniques a
s well as by X-ray analyses on selected examples.