Pyrazoles, 1,2,4-triazoles, and tetrazoles as surrogates for cis-amide bonds in boronate ester thrombin inhibitors
摘要:
Substituted pyrazoles, 1,2,4-triazoles, and tetrazoles are good surrogates for cis-amide bonds in a series of boronate ester thrombin inhibitors. (C) 1998 The DuPont Merck Pharmaceutical Company. Published by Elsevier Science Ltd. All rights reserved.
A novel method for the synthesis of 5-substituted 1H-tetrazoles using diphenyl phosphorazidate (DPPA) has been developed. Aromatic and aliphatic aldoximes underwent cycloaddition to afford the corresponding 5-substituted 1H-tetrazoles with ease and efficiency.
racemization. 5-Substituted 1H-tetrazoles were effectively synthesized from aldoximes and diphenyl phosphorazidate (DPPA) under reflux conditions in xylenes. Various aldoximes underwent the cycloaddition reaction to afford the corresponding 5-substituted 1H-tetrazoles in short reaction times and in good yields. Chiral aldoximes derived from amino acids also gave aminotetrazoles with almost no racemization.
Process for preparation of 5- substituted tetrazoles
申请人:Toyo Kasei Kogyo Company Limited
公开号:US05744612A1
公开(公告)日:1998-04-28
The invention is directed to a process for preparing a 5-substituted tetrazole, the process comprising the step of reacting a nitrile with an inorganic azide salt in an aromatic hydrocarbon solvent in the presence of an amine salt. According to the invention, a 5-substituted tetrazole can be produced in a high yield with ease and safety using inexpensive raw materials while the reaction is easily controlled to inhibit a side reaction.
Structure Property Relationships of Carboxylic Acid Isosteres
作者:Pierrik Lassalas、Bryant Gay、Caroline Lasfargeas、Michael J. James、Van Tran、Krishna G. Vijayendran、Kurt R. Brunden、Marisa C. Kozlowski、Craig J. Thomas、Amos B. Smith、Donna M. Huryn、Carlo Ballatore
DOI:10.1021/acs.jmedchem.5b01963
日期:2016.4.14
physicochemical properties of carboxylicacid isosteres would be desirable to enable more informed decisions of potential replacements to be used for analog design. Herein we report the structure–property relationships (SPR) of 35 phenylpropionic acid derivatives, in which the carboxylicacid moiety is replaced with a series of known isosteres. The data set generated provides an assessment of the relative
Reducing Platelet Activation, Aggregation and Platelet-Stimulated Thrombosis or Blood Coagulation by Reducing Mitochondrial Respiration
申请人:Collman James P.
公开号:US20110301180A1
公开(公告)日:2011-12-08
It has been discovered that inhibiting mitochondrial respiration in platelets reduces platelet activation or platelet aggregation. Certain heterocyclic compounds significantly reduced one or more platelet functions including clumping, sticking or platelet-stimulated clotting. Thus diseases or disorders mediated by inappropriately high levels of platelet activation or platelet aggregation can be treated by administering a therapeutically effective amount of a heterocyclic compound or nonheterocyclic mitochondrial inhibitor that significantly reduces one or more platelet functions including clumping, sticking or platelet-stimulated clotting, preferably in a reversible manner.