Antiproliferative activity was measured on three human cancer cell lines (A549, MCF-7, HBL-100), to show which of the structural elements of goniothalamins is mandatory for cytotoxicity. We found that the configuration of the stereogenic centre of the δ-lactone plays an important role for cytotoxicity. In our studies only (R)-configured goniothalamins showed antiproliferative activity, whereby (R)-configuration
gamma- and delta-Lactones 5, 6, 13, 14, 15 and 16 were synthesized via baker's yeast reduction of the corresponding keto acids 3 ,4 and 9-12. The enantioselectivity of the reduction is strongly dependent on the nature of the keto acid: the delta-lactones were always obtained in an ee% higher than the gamma-lactones and ranging from 70% to 100%.
RAHMAN, SHAHZAD S.;WAKEFIELD, BASIL J.;ROBERTS, STANLEY M.;DOWLE, MICHAEL+, J. CHEM. SOC. CHEM. COMMUN.,(1989) N, C. 303-304
作者:RAHMAN, SHAHZAD S.、WAKEFIELD, BASIL J.、ROBERTS, STANLEY M.、DOWLE, MICHAEL+