Improved Syntheses of 5′-S-(2-Aminoethyl)-6-N-(4-nitrobenzyl)-5′-thioadenosine (SAENTA), Analogues, and Fluorescent Probe Conjugates: Analysis of Cell-Surface Human Equilibrative Nucleoside Transporter 1 (hENT1) Levels for Prediction of the Antitumor Efficacy of Gemcitabine
摘要:
5'-S-(2-Aminoethyl)-6-N-(4-nitrobenzyl)-5'-thioadenosine (SAENTA), 5'-S-(2-acetamidoethyl)-6-N-[(4-substituted)benzyl]-5'-thioadenosine analogues, 5'-S-[2-(6-aminohexanamido)lethyl-6-N-(4-nitrobenzyl)-5'-thioadenosine (SAHENTA), and related compounds were synthesized by S(N)Ar displacement of fluoride from 6-fluoropurine intermediates with 4-(substituted)benzylamines. Conjugation of the pendant amino groups of SAENTA and SAHENTA with fluorescein-5-yl isothiocyanate (FITC) gave fluorescent probes that bound at nanomolar concentrations specifically to human equilibrative nucleoside transporter 1 (hENT1) produced in recombinant form in model expression systems and in native form in cancer cell lines. Transporter binding effects were studied and the ability of the probes to predict the potential antitumor efficacy of 2'-deoxy-2',2'-difluorocylidine (gemcitabine) was demonstrated.
Combination of MTP inhibitors or apoB-secretion inhibitors with fibrates for use as pharmaceuticals
申请人:Boehringer Ingelheim Pharma KG
公开号:US20030162788A1
公开(公告)日:2003-08-28
The invention relates to the use of fibrates for lowering the liver toxicity of MTP inhibitors as well as pharmaceutical compositions containing an MTP inhibitor and a fibrate.
Heteroarylcarboxylic acid amides, the preparation thereof and their use as pharmaceutical compositions
申请人:Boehringer Ingelheim Pharma KG
公开号:US20030073836A1
公开(公告)日:2003-04-17
A compound of formula
1
wherein: A
a
, R
a
, X
1
to X
4
, Het, and R
5
to R
7
are defined as in claim 1, the isomers and the salts thereof, particularly the physiologically acceptable salts thereof, which are valuable inhibitors of the microsomal triglyceride-transfer protein (MTP), medicaments containing these compounds and their use, as well as the preparation thereof.
Formal [4+4] reaction of the unsaturated benzyl- or allylimines, which is efficiently mediated by primary amine, provides the 2,6,9-triazabicyclo[3.3.1]nonane derivatives. Variously substituted homo- and hetero-coupling products are obtained in good to excellent yields by quite a simple procedure under mild conditions: by mixing the unsaturated aldehydes with the amines at room temperature. (C) 2012 Elsevier Ltd. All rights reserved.
KOMBINATION VON MTP INHIBITOREN ODER apoB-SEKRETIONS-INHIBITOREN MIT FIBRATEN ZUR VERWENDUNG ALS ARZNEIMITTEL