Renin inhibitors. Design and synthesis of a new class of conformationally restricted analogs of angiotensinogen
摘要:
Molecular modeling methods have been used to design a novel series of conformationally constrained cyclic peptide inhibitors of human renin. Three goals were defined: enhanced inhibitory potency, high specificity for renin, and increased metabolic stability. Three cyclic compounds were synthesized with ring sizes 10, 12, and 14, based upon a linear hexapeptide inhibitor with a reduced amide replacing the scissile bond at the active site. When tested, the 14-membered-ring compound was as potent an inhibitor of human renin as the parent while the 12-membered-ring compound was 6-fold more potent than the parent against mouse renin. However, the 10-membered-ring compound was inactive against both renins. The lack of potency of the 10-membered compound was explained by using NMR and molecular modeling techniques. It forms another conformation in solution that is inconsistent with binding at the active site. The cyclic compounds did not inhibit either pepsin or cathepsin D significantly. The cyclic modification rendered these inhibitors significantly resistant to cleavage by chymotrypsin and thus prevented loss of activity by this enzyme. Thus, the goals of enhanced inhibitory potency, high specificity, and metabolic stability were achieved in the series of compounds.
Photoinduced Electron-Transfer-Promoted Redox Fragmentation of <i>N</i>-Alkoxyphthalimides
作者:Maria Zlotorzynska、Glenn M. Sammis
DOI:10.1021/ol202740w
日期:2011.12.2
new photoinduced electron-transfer-promoted redox fragmentation of N-alkoxyphthalimides has been developed. Mechanistic experiments have established that this reaction proceeds through a unique concerted intramolecular fragmentationprocess. This distinctive mechanism imparts many synthetic advantages, which are highlighted in the redox fragmentation of various heterocyclic substrates.
Derivatives of heterocycles with 5 members, their preparation and their use as medicaments
申请人:——
公开号:US20040132788A1
公开(公告)日:2004-07-08
The invention relates to thiazole, oxazole, imidazole, isoxazole and isoxazoline derivatives of general formula (I)
1
wherein Het is thiazole, oxazole, imidazole, isoxazole or isoxazoline, n is an integer from 0 to 6, A is notably selected from various optionally substituted aromatic radicals, B is notably hydrogen, alkyl or phenyl, R
1
and R
2
are notably independently hydrogen, alkyl or cycloalkyl and &OHgr; is —NR
46
R
47
or —OR
48
R
46
and R
47
are notably independently hydrogen, alkyl, cycloalkyl or —(CH
2
)
k
—COOR
51
, R
51
is notably alkyl or haloalkyl and R
48
is notably hydrogen or alkyl.
These compounds have advantageous pharmacological properties which allow their use in therapeutics, notably for treating neurodegenerative disorders or pain.
A novel, sustainable, environmentally friendly, solvent-free and metal catalyst-free method for the CDC reaction between NHPI and benzyl/ether compounds is described.
Die vorliegende Erfindung betrifft Verbindungen, Verfahren zur ihrer Herstellung, sie umfassende pharmazeutische Zusammensetzungen sowie ihre Verwendung bei der Behandlung und/oder Prophylaxe von Erkrankungen bei Menschen oder Tieren, insbesondere bakteriellen Infektionskrankheiten (Formula I).
Die vorliegende Erfindung betrifft Verbindungen der Formel,(I), Verfahren zur ihrer Herstellung, sie umfassende pharmazeutische Zusammensetzungen sowie ihre Verwendung bei der Behandlung und/oder Prophylaxe von Erkrankungen bei Menschen oder Tieren, insbesondere bakteriellen Infektionskrankheiten.