An Old Story in the Parallel Synthesis World: An Approach to Hydantoin Libraries
作者:Andrey V. Bogolubsky、Yurii S. Moroz、Olena Savych、Sergey Pipko、Angelika Konovets、Maxim O. Platonov、Oleksandr V. Vasylchenko、Vasyl V. Hurmach、Oleksandr O. Grygorenko
DOI:10.1021/acscombsci.7b00163
日期:2018.1.8
An approach to the parallel synthesis of hydantoin libraries by reaction of in situ generated 2,2,2-trifluoroethylcarbamates and α-amino esters was developed. To demonstrate utility of the method, a library of 1158 hydantoins designed according to the lead-likeness criteria (MW 200–350, cLogP 1–3) was prepared. The success rate of the method was analyzed as a function of physicochemical parameters
Provided herein are compounds of the formula (I):
as well as pharmaceutically acceptable salts thereof, wherein the substituents are as those disclosed in the specification. These compounds, and the pharmaceutical compositions containing them, are useful for the treatment of metabolic diseases and disorders such as, for example, type II diabetes mellitus.
[EN] WHOLE CELL ASSAY INVOLVING CATHEPSIN S<br/>[FR] DOSAGE DE CELLULE ENTIERE ASSOCIE A LA CATHEPSINE S
申请人:MERCK FROSST CANADA INC
公开号:WO2005028424A1
公开(公告)日:2005-03-31
The present invention relates to a method of identifying and evaluating chemical inhibitors of cathepsin S activity in whole cells. The present invention also relates to probes that are capable of forming irreversible adducts with cathepsin S at the active site. The probes used in the instant invention comprise radioactive functional groups to allow the detection of the irreversible cathepsin S-probe adducts.
The solid support acts as a protecting group for the amino acid. N-Protected amino acid is N-nitrosated, and the subsequent treatment with acetic anhydride in a microwave reactor yields mesoionic sydnones that react in situ in 1,3-dipolar cycloaddition reactions with alkynes. Traceless cleavage of the products gives N-unsubstituted pyrazoles in high overall yields.
Synthesis and Reactions of New Chiral Linear and Macrocyclic Tetraand Penta-peptide Candidates
作者:Mohamed H. Ghalia、Mohamed Abd El-Hamid、Mohamed A. Zweil、Abd El-Galil E. Amr、Shimaa A. Moafi
DOI:10.5560/znb.2012-0116
日期:2012.8.1
latter compounds 4were coupled with other amino acid methyl esters to afford the corresponding tetrapeptide esters 5, which were hydrolyzed with sodium hydroxide to the corresponding acids 6. Cyclization of tetrapeptide acids with L-lysine methyl ester or with aliphatic diamide derivatives afforded the corresponding cyclic pentapeptide methyl ester derivatives 7and cyclic tetrapeptide diamines 8, respectively