119030-78-3Relevant academic research and scientific papers
(-)-Arctigenin as a lead structure for inhibitors of human immunodeficiency virus type-1 integrase
Eich, Eckart,Pertz, Heinz,Kaloga, Macki,Schulz, Jutta,Fesen, Mark R.,Mazumder, Abhijit,Pommier, Yves
, p. 86 - 95 (2007/10/03)
The natural dibenzylbutyrolactone type lignanelide (-)-arctigenin (2), an inhibitor of human irnmunodeficiency virus type-1 (HIV-1) replication in infected human cell systems, was found to suppress the integration of proviral DNA into the cellular DNA genome. In the present study 2 was tested with purified HIV-1 integrase and found to be inactive in the cleavage (3'- processing) and integration (strand transfer) assays. However, the semisynthetic 3-O-demethylated congener 9 characterized by a catechol substructure exhibited remarkable activities in both assays. Structure- activity relationship studies with 30 natural (1-6), semisynthetic (7-21), and synthetic (37-43, 45, 46) lignans revealed that (1) the lactone moiety is crucial since compounds with a butane-1,4-diol or tetrahydrofuran substructure and also lignanamide analogues lacked activity and (2) the number and arrangement of phenolic hydroxyl groups is important for the activity of lignanolides. The congener with two catechol substructures (7) was found to be the most active compound in this study. 7 was also a potent inhibitor of the 'disintegration' reaction which models the reversal of the strand transfer reaction. The inhibitory activity of 7 with the core enzyme fragment consisting of amino acids 50-212 suggests that the binding site of 7 resides in the catalytic domain.
Oxidative Coupling of Lignans. IV. Monophenolic Oxidative Coupling
Burden, Jonathan K.,Cambie, Richard C.,Craw, Peter A.,Rutledge, Peter S.,Woodgate, Paul D.
, p. 919 - 933 (2007/10/02)
Oxidative coupling of the monophenolic monoester (6) gives an aryltetralin (12) which is a potential intermediate for the synthesis of clinically active monophenolic lignan lactones.In contrast, oxidative couplings of the monophenols (32) and (35), derived from matairesinol (29), give mixtures of diastereoisomeric cyclooctadiene lignans while 4'-demethyldeoxypodorhizon (26) does not cyclize.These results show that the degree of aromatic substitution in monophenolic diarylbutanes plays an important role in determining the outcome of oxidative coupling.An alternative synthesis of the lactone (57) from piperonal has been investigated.
