
TY  - JOUR
A1  - Wazeer, MIM 
A1  - Kumar, V 
A1  - Weeratunga, G 
A1  - Wijeratna, DBT 
T1  - Carbon-13 N.M.R. lanthanide-induced shift study of some D:A-friedooleananes
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1984
VL  - 37
IS  - 12
SP  - 2571
EP  - 2575
KW  - 
UR  - https://doi.org/10.1071/CH9842571 
N2  - Carbon-13 n.m.r. signal assignments for D:A-friedooleanan-28-ol (1), D:A-friedooleanan-29-ol (2), D:A-friedooleanan-30-ol (3)D:a-friedooleanan-30-ol (4, D:A-friedooleanan-21&#945;-ol (5) and 21&#945;- hydroxy-D:A-friedooleanan-3-one (6) are reported. Lanthanide-induced shifts of the hydroxy compounds indicate that the oxygenation in the vicinity of ring E in these molecules does not affect the chair-chair-chair-twistboat-boat conformation proposed for D:A-friedooleananes. 
ER  -

