Synthesis and antimicrobial evaluation of water-soluble, dendritic derivatives of epimeric 5α-cholestan-3-amines and 5α-cholestan-3-yl aminoethanoates
摘要:
To examine the effect of negatively charged steroidal amphiphiles on antimicrobial activity, two pairs of epimeric, dendritic tricarboxylato amphiphiles -4-(2-carboxyethyl)-4-[3-(5 alpha-cholestan-3-yl)ureido]heptanedioic acid (1) and 4-(2-carboxyethyl)-4-[3-(5 alpha-cholestan-3-yloxycarbonylmethyl)ureido]heptanedioic acid (2) - were synthesized. Abroad antimicrobial screen of 11 microbes revealed that these amphiphiles only showed good activity against a methicillin -resistant isolate of Staphylococcus aureus (MRSA) and modest activity against an unrelated strain of S aureus The best activity a minimal inhibitory concentration (MIC) of 27 mu M, was found for the 3 beta epimer of 1 against MRSA. (c) 2007 Elsevier Inc. All rights reserved.
[EN] SHIP INHIBITION TO COMBAT OBESITY<br/>[FR] INHIBITION DE SHIP DANS LE CADRE DE LA LUTTE CONTRE L'OBÉSITÉ
申请人:UNIV NEW YORK STATE RES FOUND
公开号:WO2015003003A1
公开(公告)日:2015-01-08
The present invention relates to the use of SHIP1 inhibitors and pan-SHIP1/2 inhibitors in various methods, including, without limitation: (i) a method to treat obesity or reduce body fat of an obese subject; (ii) a method to limit bone development in a subject suffering from an osteopetrotic or sclerotic disease; (iii) a method to treat or prevent diabetes; (iv) a method to reduce glucose intolerance or insulin resistance; and (v) a method to lower cholesterol.
[EN] METHODS OF ACTIVATING MICROGLIAL CELLS<br/>[FR] PROCÉDÉS D'ACTIVATION DE CELLULES MICROGLIALES
申请人:UNIV NEW YORK STATE RES FOUND
公开号:WO2020028552A1
公开(公告)日:2020-02-06
The present disclosure provides methods of using compositions that inhibit SH2-containing inositol 5'-phosphatases (SHIPs) for activating microglial cells, as well as methods for using such compositions for treatment or ameliorating of neurodegenerative disorders in a subject.
Nicotinoyl Azide (NCA)-Mediated Mitsunobu Reaction: An Expedient One-Pot Transformation of Alcohols into Azides
作者:Gianluca Papeo、Helena Posteri、Paola Vianello、Mario Varasi
DOI:10.1055/s-2004-831254
日期:——
A practical and simple method that allows preparation of azides from alcohols is described. The process involves oxyphosphonium-type activation and it is based upon the use of nicotinoyl azide (NCA), a cheap and easily accessible azide ion source.
Zinc Azide Mediated Mitsunobu Substitution. An Expedient Method for the One-Pot Azidation of Alcohols
作者:Marie Claude Viaud、Patrick Rollin
DOI:10.1055/s-1990-26809
日期:——
In the presence of the diisopropyl azodicarboxylate/triphenylphosphine couple, alcohols react with zinc azide/bis-pyridine complex to give various azides via a Mitsunobu-type substitution.
Studies on the Transformation of Azido-Group to N-(t-Butoxycarbonyl)amino Group<i>via</i>Staudinger Reaction
作者:Carlos A. M. Afonso
DOI:10.1080/00397919808005719
日期:1998.1
tri-n-butylphosphine, followed by addition of di-t-butyl dicarbonate (Boc2O) affords, N-(t-Butoxycarbonyl)amines 2 in moderate to good overall yields. For secondary azides the formation of symmetricaldisubstitutedureas is a competitive process. Conditions were found which, in the presence of a primary amine, allow for moderate selectivity for the reaction with Boc2O.