64715-80-6Relevant articles and documents
Helical chirality induction in zinc bilindiones by amino acid esters and amines
Mizutani, Tadashi,Yagi, Shigeyuki,Honmaru, Atsushi,Murakami, Shinji,Furusyo, Masaru,Takagishi, Toru,Ogoshi, Hisanobu
, p. 8769 - 8784 (1998)
Complexation of α-amino acid esters, β-amino ethers, and amines with a series of zinc 1,19-bilindione derivatives was studied, particularly focusing on the helical chirality induction in the bilindione framework triggered by the binding of chiral guests. Comparative studies of binding and helical chirality induction indicated that binding and chiral induction were markedly affected by polar substituents present in both zinc bilindiones and guests. 2-Hydroxyethyl groups at the 2,18-positions of zinc bilindione largely assisted the binding of amines and amino acid esters but not the chiral induction. 19O-Alkylation of the zinc bilindiones had inhibitory effects on the binding but enhanced efficiency of helical chirality induction. The enantiomeric excess of 19O-alkyl zinc bilindione complexed with L-Trp-OMe in CD2Cl2 was 73% at 223 K. A COOR group and an aromatic group in the guest promoted helical chirality induction of 19O-alkylated zinc bilindiones. The patterns of 1H NMR complexation-induced shifts of zinc bilindiones and guests and a molecular modeling study of the complexes showed that electrostatic repulsion between the COOR group of amino acid esters and the lactam ring of zinc bilindiones, and stacking of the side chain groups of amino acid esters on the C ring of zinc bilindione made a significant contribution to efficient helical chirality induction.
NOVEL AMINOPYRIDINEMETHANOL COMPOUNDS AND THEIR USE
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Page/Page column 45; 73; 75, (2019/05/22)
The present invention is directed to novel compounds of Formula (I): pharmaceutically acceptable salts or solvates thereof, and their use, in particular in the treatment or prevention of malaria.
First syntheses of lorneic acids A and B with potential PDE5 inhibition activity
Ma, Xiang,Song, Yuting,Liu, Hao,Chen, Ruijiao,Chen, Xiaochuan
scheme or table, p. 607 - 610 (2012/03/27)
Two natural products with potential PDE5 inhibition activity, lorneic acids A and B, have been synthesized for the first time in high yield using a chiral amide stereocontrolled addition of aryl lithium to aldehyde as the key step, and the configuration of the chiral benzylic alcohol in lorneic acid B was determined to be S. Georg Thieme Verlag Stuttgart · New York.