Synthesis of Lanostane-Type Triterpenoid N-Glycosides and Their Cytotoxicity against Human Cancer Cell Lines.

Seventeen lanostane-type triterpenoid derivatives (2 - 18), including 11N-glycosides (8 - 18), were synthesized from the natural triterpenoid, lanosterol (1), and were evaluated for their cytotoxicity against the human cancer cell lines, HL-60, A549, and MKN45, as well as the normal human lung cells, WI-38. Among them, N-β-d-2-acetamido-2-deoxyglucoside (10) showed cytotoxicity against HL-60, A549, MKN45, and WI-38 cells (IC 0.0078 - 2.

Planar-chiral metal complexes comprised of square-planar metal and achiral tetradentate ligands: design, optical resolution, and thermodynamics.

Planar-chiral palladium complexes {[[N,N'-[1,4-butanediylbis(oxy-7,1-naphthalenediyl)]bis(2-pyridinecarboxamidato)](2-)-κN(1),κN(1)',κN(2),κN(2)']palladium (PdL(4)) and [[2,2'-[1,4-butanediylbis[[(oxy-7,1-naphthalenediyl)imino]methyl]]dipyrrolato](2-)-κN(1),κN(1)',κN(2),κN(2)']palladium (PdL(5))} were synthesized from achiral tetradentate ligands N,N'-[1,4-butanediylbis(oxy-7,1-naphthalenediyl)]bis(2-pyridinecarboxamide) (H(2)L(4)) and N,N'-bis[(1H-pyrrol-2-yl)methylidene]-7,7'-(1,4-butanediyldioxy)bis(1-naphthalenamine) (H(2)L(5)) bearing two dissymmetric bidentate units at both ends and a Pd(II) ion, respectively. The palladium complexes were crystallized in the monoclinic space group P2(1)/n with the unit cell parameters a = 16.5464(6) Å, b = 11.