
TY  - JOUR
A1  - Hambley, Trevor W. 
A1  - Lewis, Keith G. 
A1  - Tucker, David J. 
A1  - Turner, Peter 
T1  - Stereochemical Study of a 13&#946;,28-Epoxyoleanane
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1998
VL  - 51
IS  - 4
SP  - 343
EP  - 346
KW  - 
UR  - https://doi.org/10.1071/C97109 
N2  - The stereochemistry of 3&#946;-acetoxy-12&#945;-bromo-13&#946;,28-epoxyoleanan-16&#945;-ol (2b) has been examined by n.m.r. methods and established by an X-ray crystallographic examination. Steric hindrance of the 16&#945;-hydroxy group is shown not to be as great as previously reported. The bromo epoxide (2b), C32H51BrO4, M 579&#183;66, crystallized in the orthorhombic space group P 212121 with a 16&#183;118(2), b 16&#183;615(3), c 11&#183;024(7) &#197;, V 2952(1) &#197;3 , Dc(Z = 4) 1&#183;304 g cm-3 , N = N(unique) = 1954, No 1731 &#91;I &#62; 2&#183;5&#963;(I)&#93;, Nvar = 335, conventional R 0&#183; 039, Rw 0&#183;038. 
ER  -

