U. Bohm et al., PREPARATION OF OPTICALLY-ACTIVE 3,9-DISUBSTITUTED SPIRO[5.5]UNDECANE DERIVATIVES AND THE DETERMINATION OF THEIR ABSOLUTE-CONFIGURATION, Tetrahedron : asymmetry, 5(7), 1994, pp. 1281-1290
The enantiomerically pure 3,9-disubstituted spirol[5.5]undecane deriva
tives 1 to 8 have been prepared by resolution and their absolute confi
guration determined by chemical correlation with the known (aS)-(-)-sp
iro[5.5]undecane-3,9-diol (9).