334678-81-8Relevant articles and documents
Synthesis and characterization of sulfonated and poly(ethylene glycol)-calix[4]arene tertiary phosphines
Shen, Jinyu,Roundhill, D. Max
, p. 33 - 42 (2000)
Sulfonation of triphenylphosphine with a 30% oleum solution gave phenyl-di-(3-sulfonatophenyl) phosphine. The structure was confirmed by a combination of 1H and 13C NMR spectroscopy. A pair of calix[4]arenes with a tertiary phosphine group on one rim and a methoxy ethylene glycol group on the other were prepared and characterized. One had the phosphine moiety on the narrow rim, and the other had the phosphine on the wide rim. Structural characterization was again by a combination of 1H and 13C NMR spectroscopy.