- Effect of the Heteroaromatic Antenna on the Binding of Chiral Eu(III) Complexes to Bovine Serum Albumin
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The cationic enantiopure (R,R) and luminescent Eu(III) complex [Eu(bisoQcd)(H2O)2] OTf (with bisoQcd = N,N′-bis(2-isoquinolinmethyl)-trans-1,2-diaminocyclohexane N,N′-diacetate and OTf = triflate) was synthesized and characterized. At physiological pH, the 1:1 [Eu(bisoQcd)(H2O)2]+ species, possessing two water molecules in the inner coordination sphere, is largely dominant. The interaction with bovine serum albumin (BSA) was studied by means of several experimental techniques, such as luminescence spectroscopy, isothermal titration calorimetry (ITC), molecular docking (MD), and molecular dynamics simulations (MDS). In this direction, a ligand competition study was also performed by using three clinically established drugs (i.e., ibuprofen, warfarin, and digitoxin). The nature of this interaction is strongly affected by the type of the involved heteroaromatic antenna in the Eu(III) complexes. In fact, the presence of isoquinoline rings drives the corresponding complex toward the protein superficial area containing the tryptophan residue 134 (Trp134). As the main consequence, the metal center undergoes the loss of one water molecule upon interaction with the side chain of a glutamic acid residue. On the other hand, the similar complex containing pyridine rings ([Eu(bpcd)(H2O)2]Cl with bpcd = N,N′-bis(2-pyridylmethyl)-trans-1,2-diaminocyclohexane N,N′-diacetate) interacts more weakly with the protein in a different superficial cavity, without losing the coordinated water molecules.
- De Rosa, Chiara,Melchior, Andrea,Sanadar, Martina,Tolazzi, Marilena,Giorgetti, Alejandro,Ribeiro, Rui P.,Nardon, Chiara,Piccinelli, Fabio
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Read Online
- TARGETED RADIOPHARMACEUTICALS FOR THE DIAGNOSIS AND TREATMENT OF PROSTATE CANCER
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A compound of general formula (I): wherein: n is 1, 2 or 3; R1, R2, R3 and R4, independently represent OH or Q; and 20 Q represents a tissue-targeting moeity selected from the group consisting of or a stereoisomer, a hydrate, a solvate, or a salt thereof, or a mixture of same, methods of preparing said compounds, intermediate compounds useful for preparing said compounds, pharmaceutical compositions and combinations comprising said compounds and the use of said 25 compounds for manufacturing pharmaceutical compositions for the treatment or prophylaxis of diseases, in particular of soft tissue diseases, as a sole agent or in combination with other active ingredients.
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Page/Page column 319
(2021/01/29)
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- Biocatalytic reduction of α,β-unsaturated carboxylic acids to allylic alcohols
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We have developed robust in vivo and in vitro biocatalytic systems that enable reduction of α,β-unsaturated carboxylic acids to allylic alcohols and their saturated analogues. These compounds are prevalent scaffolds in many industrial chemicals and pharmaceuticals. A substrate profiling study of a carboxylic acid reductase (CAR) investigating unexplored substrate space, such as benzo-fused (hetero)aromatic carboxylic acids and α,β-unsaturated carboxylic acids, revealed broad substrate tolerance and provided information on the reactivity patterns of these substrates. E. coli cells expressing a heterologous CAR were employed as a multi-step hydrogenation catalyst to convert a variety of α,β-unsaturated carboxylic acids to the corresponding saturated primary alcohols, affording up to >99percent conversion. This was supported by the broad substrate scope of E. coli endogenous alcohol dehydrogenase (ADH), as well as the unexpected CC bond reducing activity of E. coli cells. In addition, a broad range of benzofused (hetero)aromatic carboxylic acids were converted to the corresponding primary alcohols by the recombinant E. coli cells. An alternative one-pot in vitro two-enzyme system, consisting of CAR and glucose dehydrogenase (GDH), demonstrates promiscuous carbonyl reductase activity of GDH towards a wide range of unsaturated aldehydes. Hence, coupling CAR with a GDH-driven NADP(H) recycling system provides access to a variety of (hetero)aromatic primary alcohols and allylic alcohols from the parent carboxylates, in up to >99percent conversion. To demonstrate the applicability of these systems in preparative synthesis, we performed 100 mg scale biotransformations for the preparation of indole-3-aldehyde and 3-(naphthalen-1-yl)propan-1-ol using the whole-cell system, and cinnamyl alcohol using the in vitro system, affording up to 85percent isolated yield.
- Aleku, Godwin A.,Leys, David,Roberts, George W.
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p. 3927 - 3939
(2020/07/09)
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- Reductive carbonylation of aryl halides employing a two-chamber reactor: A protocol for the synthesis of aryl aldehydes including 13C- and D-isotope labeling
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A protocol has been developed for conducting the palladium-catalyzed reductive carbonylation of aryl iodides and bromides using 9-methylfluorene-9- carbonyl chloride (COgen) as a source of externally delivered carbon monoxide in a sealed two-chamber system (COware), and potassium formate as the in situ hydride source. The method is tolerant to a wide number of functional groups positioned on the aromatic ring, and it can be exploited for the isotope labeling of the aldehyde group. Hence, reductive carbonylations run with 13COgen provide a facile access to 13C-labeled aromatic aldehydes, whereas with DCO2K, the aldehyde is specifically labeled with deuterium. Two examples of double isotopic labeling are also demonstrated. Finally, the method was applied to the specific carbon-13 labeling of the β-amyloid binding compound, florbetaben.
- Korsager, Signe,Taaning, Rolf H.,Lindhardt, Anders T.,Skrydstrup, Troels
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p. 6112 - 6120
(2013/07/26)
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- Microwave-promoted synthesis of N-heterocycles by tandem imination/ annulation of γ- and δ-ketoalkynes in the presence of ammonia
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The synthesis of 3-substituted l-methylpyrrolo[l,2-a]pyrazines and 3-substituted isoquinolines was achieved by the intramolecular cyclisation of 2-acetyl-l-propargylpyrroles and 2-alkynylbenzaldehydes, respectively, in the presence of ammonia under microwave heating. The tandem imination/annulation of 2-alkynylbenzaldehydes was easily accomplished under standard conditions, while TiCl4 was used to achieve pyrrolo[l,2-a]pyrazines. The reaction mechanism and the regioselectivity were discussed on the basis of theoretical calculations and spectroscopic data. Wiley-VCH Verlag GmbH & Co. KGaA.
- Alfonsi, Maria,Dell'Acqua, Monica,Facoetti, Diego,Arcadi, Antonio,Abbiati, Giorgio,Rossi, Elisabetta
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experimental part
p. 2852 - 2862
(2009/09/06)
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- Substituted arylamides
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Substituted benzamide compounds are provided along with methods for the use of those compounds for treating cancer.
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Page/Page column 32; 49
(2010/10/20)
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- AMINE COMPOUNDS AND USE THEREOF
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It is intended to provide novel amine compounds which are efficacious against diseases such as infection with HIV virus, rheumatism and cancer metastasis. Namely, amine compounds represented by the following general formula (1):In a typical case, A1 and A2 represent each an optionally substituted monocyclic or polycyclic aromatic heterocycle; W represents cyclic C3-10 alkylene, an optionally substituted monocyclic or polycyclic aromatic heterocycle, a monocyclic or polycyclic aromatic ring or a partly saturated polycyclic aromatic ring; X represents O, CH2, C(=O) or NR11; and D is a group represented by the following general formula (4) or (6).-Q-Y-BIn the formula (6), Q represents a single bond, S, O or NR12; and Y is a group represented by the following general formula (7). z represents an optionally substituted monocyclic or polycyclic aromatic ring. In the formula (6), B represents NR25R26. In the above formulae, R1 to R26 each represents hydrogen, alkyl, alkenyl or alkynyl.
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Page/Page column 61-62
(2010/02/12)
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- HETEROCYCLIC ANTI-MIGRAINE AGENTS
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The present invention relates to compounds of Formula (I) as antagonists of calcitonin gene-related peptide receptors (“CGRP-receptor”), pharmaceutical compositions comprising them, methods for identifying them, methods of treatment using them and their use in therapy for treatment of neurogenic vasodilation, neurogenic inflammation, migraine and other headaches, thermal injury, circulatory shock, flushing associated with menopause, airway inflammatory diseases, such as asthma and chronic obstructive pulmonary disease (COPD), and other conditions the treatment of which can be effected by the antagonism of CGRP-receptors.
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Page/Page column 75-76
(2008/06/13)
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- 4-AMINO-PIPERIDINE DERIVATIVES AS MONOAMINE UPTAKE INHIBITORS
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The present invention provides compounds of formula (I) where n, R1, R2, R3, R4, R5 and Heteroaryl are defined herein. The compounds are inhibitors of the uptake of one or more monoamines selected from serotonin, norepinephrine and dopamine and, as such,
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Page/Page column 73
(2008/06/13)
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- SUBSTITUTED 3-AMINO-THIENO[2,3-B] PYRIDINE-2-CARBOXYLIC ACID AMIDE COMPOUNDS AS IKK INHIBITORS
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Disclosed are compounds of formula (I): wherein the variables R1, R2, R3 and Z are described herein, which are useful as inhibitors of the kinase activity of the IκB kinase (IKK) complex. The compounds are therefore useful in the treatment of IKK mediated diseases including autoimmune diseases inflammatory diseases and cancer. Also disclosed are pharmaceutical compositions comprising these compounds and processes for preparing these compounds.
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Page/Page column 71-72
(2008/06/13)
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- Homochiral isoquinolines by lipase-catalysed resolution and their diastereoselective functionalisation
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Kinetic resolution of racemic isoquinoline alcohols and acetates has been successfully accomplished using lipases as chiral catalysts. The diastereoselective functionalisation of the isoquinoline moiety through the addition of C-nucleophiles to O-protected alcohol 9a in the presence of phenyl chloroformate has been carried out and dihydroquinolyl alcohol derivatives with high diastereomeric excess have been prepared.
- Guanti, Giuseppe,Riva, Renata
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p. 1185 - 1200
(2007/10/03)
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- Preparation of (S)-2-quinolylalanine by asymmetric hydrogenation
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The synthesis of (S)-2-quinolylalanine through asymmetric hydrogenation with (S,S)-Et-DuPHOS-Rh is described. The reaction has been extended to other 2-pyridylalanine derivatives.
- Jones,Palmer,Paul,Tiffin
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p. 1211 - 1214
(2007/10/03)
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- Substituted 6,11-ethano-6,11-dihydrobenzo[b] quinolizinium salts and compositions and methods of use thereof
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Substituted 6,11-ethano-6,11-dihydrobenzo[b]quinolizinium salts, pharmaceutical compositions containing them, and methods for the treatment of neurodegenerative disorders or neurotoxic injuries utilizing them, wherein the substituted 6,11-ethano-6,11-dihydrobenzo[b]quinolizinium salts have the formula: STR1 wherein: R1, R2, R3, R4, R5, R6, R7, X and p are as defined in the specification.
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- Heterocyclic derivatives
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The invention concerns a thiazole of the formula I, wherein Q1 is an optionally substituted 6-membered monocyclic or 10-membered bicyclic heterocyclic moiety containing one or two nitrogen atoms;, X is oxy, thio, sulphinyl, sulphonyl or imino;, Ar is phenylene which may optionally bear one or two substituents, or Ar is an optionally substituted 6-membered heterocyclene moiety contining up to three nitrogen atoms;, R1 is hydrogen, (1-6C)alkyl, (2-6C)alkenyl, (2-6C)alkynyl or substituted (1-4C)alkyl;, R2 is hydrogen, (1-6C)alkyl, (3-6C)alkenyl, (3-6C)alkynyl or substituted (1-4C)alkyl or R2 is optionally substituted benzoyl; and, Q2 is optionally substituted thiazolyl;, or a pharmaceutically-acceptable salt thereof. The invention also concerns processes for the manufacture of a thiazole of the formula I and pharmaceutical compositions containing said thiazole.
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