
TY  - JOUR
A1  - Roy, Jackson W 
A1  - Thomson, RJ 
A1  - Mackay.M.F, . 
T1  - The Stereochemistry of Organmetallic Compounds. XXV. The Stereochemistry of Displacements of Secondary Methanesulfonate and <i>p</i>-Toluene-sulfonate esters by Diphenylphosphide Ions. X-ray Crystal Structure of (5&#945;- Cholestan- 3&#945;-yl)diphenylphosphine Oxide
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1985
VL  - 38
IS  - 1
SP  - 111
EP  - 118
KW  - 
UR  - https://doi.org/10.1071/CH9850111 
N2  - Reactions of both axial and equatorial cholestan-3&#945;- and -3&#946;-yl mesylates and tosylates with sodium diarylphosphides give cholestanylphosphines in good yield and with complete inversion of stereochemistry. The stereochemistry has been established by an X-ray crystal structure of (5&#945;-cholestan-3&#945;-yl) diphenylphosphine oxide, and a general method for distinguishing between axial and equatorial phosphines based on 31P N.M.R . spectra is presented. The monophosphines were used as ligands in asymmetric hydrogenation, but only low optical yields were obtained. 
ER  -

