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Górecki M, Roszkowski P, Błachut D, Maurin JK, Budzianowski A, Frelek J, Czarnocki Z. Atropoisomerism in Mono- and Diaryl-Substituted 4-Amino-2,6-lutidines. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600456] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Łukowska-Chojnacka E, Staniszewska M, Bondaryk M, Maurin JK, Bretner M. Lipase-Catalyzed Kinetic Resolution of Novel Antifungal N-Substituted Benzimidazole Derivatives. Chirality 2016; 28:347-54. [PMID: 26922853 DOI: 10.1002/chir.22591] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 01/08/2016] [Accepted: 01/29/2016] [Indexed: 11/10/2022]
Abstract
A series of new N-substituted benzimidazole derivatives was synthesized and their antifungal activity against Candida albicans was evaluated. The chemical step included synthesis of appropriate ketones containing benzimidazole ring, reduction of ketones to the racemic alcohols, and acetylation of alcohols to the esters. All benzimidazole derivatives were obtained with satisfactory yields and in relatively short times. All synthesized compounds exhibit significant antifungal activity against Candida albicans 900028 ATCC (% cell inhibition at 0.25 μg concentration > 98%). Additionally, racemic mixtures of alcohols were separated by lipase-catalyzed kinetic resolution. In the enzymatic step a transesterification reaction was applied and the influence of a lipase type and solvent on the enantioselectivity of the reaction was studied. The most selective enzymes were Novozyme SP 435 and lipase Amano AK from Pseudomonas fluorescens (E > 100).
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Lisiecki K, Krawczyk KK, Roszkowski P, Maurin JK, Czarnocki Z. Formal synthesis of (−)-podophyllotoxin through the photocyclization of an axially chiral 3,4-bisbenzylidene succinate amide ester – a flow photochemistry approach. Org Biomol Chem 2016; 14:460-469. [DOI: 10.1039/c5ob01844g] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have developed a strategy for the stereoselective synthesis of cyclolignans related to podophyllotoxin and its derivatives.
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Roszkowski P, Maurin JK, Czarnocki Z. The enantioselective synthesis of (S)-(+)-mianserin and (S)-(+)-epinastine. Beilstein J Org Chem 2015; 11:1509-13. [PMID: 26425208 PMCID: PMC4578372 DOI: 10.3762/bjoc.11.164] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Accepted: 08/18/2015] [Indexed: 11/25/2022] Open
Abstract
A simple enantioselective synthetic procedure for the preparation of mianserin and epinastine in optically pure form is described. The key step in the synthetic pathway is the asymmetric reduction of the cyclic imine using asymmetric transfer hydrogenation conditions.
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Szawkało J, Maurin JK, Pluciński F, Czarnocki Z. Synthesis and dynamic stereochemistry of 4-aryl-thiomorpholine-3,5-dione derivatives. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2014.08.046] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Błachut D, Maurin JK, Starosta W, Wojtasiewicz K, Czarnocki Z. (2S)-1-(4-Methoxyphenyl)-N-[(1R)-2-(4-methoxyphenyl)-1- methylethyl]-2-propanamine in Crude p-Methoxyamphetamine (PMA) Produced by the Leuckart Method. ACTA ACUST UNITED AC 2014. [DOI: 10.1515/znb-2002-0518] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The synthesis and separation of both diastereoisomers of 1-(4-methoxyphenyl)-N-[2- (4-methoxyphenyl)-1-methylethyl]-2-propanamine as markers of clandestine p-methoxyamphetamine have been described. The stereochemistry of the meso diastereomer was established by crystallographic method.
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Traldi P, Molin L, Crotti S, Seraglia R, Czarnocki Z, Szawkało J, Maurin JK, Pluciński FA. Chemical aspects of the primary ionization mechanisms in matrix-assisted laser desorption ionization. EUROPEAN JOURNAL OF MASS SPECTROMETRY (CHICHESTER, ENGLAND) 2014; 20:437-444. [PMID: 25905868 DOI: 10.1255/ejms.1296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
It has been proposed that the primary ionization mechanism occurring in matrix-assisted laser desorption ionization (MALDI) experiments originates from the presence, in the solid-state matrix-analytes sample, of matrix dimers. These species are formed by the interaction of carboxylic groups present in the matrix molecules with the formation of strong hydrogen bonds. Theoretical calculations proved that the laser irradiation of these structures leads to one or two H-bridge cleavages, giving rise to an "open" dimer structure or to disproportionation with the formation of MH(+) and [M-H](-) species. The ions so formed can be considered highly effective in their reaction with analyte ions, leading to their protonation (or deprotonation). To achieve further evidence for these proposals, in the present study the energetics of the reactions of ions from different aromatic carboxylic acids with two amino acids (glycine and lysine) and three multipeptides (gly-gly, gly-gly-gly and gly-gly-gly-gly) was investigated. The lowest ∆G values were obtained for 2,5- dihydroxybenzoic acid, widely employed as the MALDI matrix. Also, for p-nitrobenzoic acid the reaction is slightly exothermic, while for the other aromatic carboxylic acids derivatives positives values of ∆G are present.
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Roszkowski P, Błachut D, Maurin JK, Woźnica M, Frelek J, Pluciński F, Czarnocki Z. Atropisomerism in 3,4,5-Tri-(2-methoxyphenyl)-2,6-lutidine. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301378] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Granica S, Kiss AK, Jarończyk M, Maurin JK, Mazurek AP, Czarnocki Z. Synthesis of imperatorin analogs and their evaluation as acetylcholinesterase and butyrylcholinesterase inhibitors. Arch Pharm (Weinheim) 2013; 346:775-82. [PMID: 24123207 DOI: 10.1002/ardp.201300259] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Revised: 08/09/2013] [Accepted: 08/12/2013] [Indexed: 11/06/2022]
Abstract
In this study, we synthesized several imperatorin analogs using imperatorin and xanthotoxin as substrates. The anti-cholinesterase activities of all compounds were evaluated in in vitro experiments according to the modified Ellman's method. For each synthesized compound, IC50 values for both enzymes were established. Galantamine hydrobromide was used as a positive control in the enzymatic experiments. All active compounds showed selectivity toward butyrylcholinesterase (BuChE) rather than acetylcholinesterase. The most active ones were 8-(3-methylbutoxy)-psoralen and 8-hexoxypsoralen with IC50 values for BuChE of around 16.5 and 16.4 µM, respectively. The results of our study may be considered as the beginning of a search for potential anti-Alzheimer's disease drugs based on the structure of natural furocoumarins.
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Molęda Z, Zawadzka A, Żytek M, Madej D, Pluciński F, Maurin JK, Czarnocki Z. Unexpected reaction of melatonin derivatives with performic acid. CR CHIM 2013. [DOI: 10.1016/j.crci.2013.03.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Kończyk AA, Szawkało J, Maurin JK, Czarnocki Z. Efficient One-Pot Synthesis of a Densely Functionalized Tetrahydropyridine in the Presence of [1,1′-Binaphthalene]-2,2′-diol/Indium(III) Chloride (binol/InCl3) or SimpleBrønstedAcids as Catalysts. Helv Chim Acta 2013. [DOI: 10.1002/hlca.201200517] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Maurin JK, Zawadzka A, Łozińska I, Czarnocki Z. 3-(2-Acetamido-eth-yl)-1H-indol-5-yl 4-nitro-phenyl carbonate. Acta Crystallogr Sect E Struct Rep Online 2012; 68:o2915. [PMID: 23125706 PMCID: PMC3470262 DOI: 10.1107/s1600536812038238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2012] [Accepted: 09/06/2012] [Indexed: 12/04/2022]
Abstract
In the title mol-ecule, C(19)H(17)N(3)O(6), the indole ring system is essentially planar (r.m.s. deviation = 0.009 Å) and forms a dihedral angle of 31.96 (9)° with the nitro-substituted benzene ring. In the crystal, mol-ecules are linked by pairs of N-H⋯O hydrogen bonds, forming inversion dimers which are connected by further N-H⋯O hydrogen bonds into a two-dimensional network parallel to (102).
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Roszkowski P, Maurin JK, Czarnocki Z. Novel (R)-(+)-limonene-derived ligands: synthesis and application in asymmetric transfer hydrogenations. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.tetasy.2012.06.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Latosińska JN, Latosińska M, Tomczak MA, Seliger J, Zagar V, Maurin JK. Conformations and intermolecular interactions pattern in solid chloroxylenol and triclosan (API of anti-infective agents and drugs). A (35)Cl NQR, (1)H-(14)N NQDR, X-ray and DFT/QTAIM study. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2012; 50:89-105. [PMID: 22354770 DOI: 10.1002/mrc.2799] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2010] [Revised: 05/22/2011] [Accepted: 08/08/2011] [Indexed: 05/31/2023]
Abstract
Two antibacterial and antifungal agents, chloroxylenol (4-chloro-3,5-dimethyl-phenol) and triclosan (5-chloro-2-(2',4'-dichlorophenoxy)-phenol), were studied experimentally in solid state with an X-ray, (35)Cl-nuclear quadrupole resonance (NQR) and (17)O-nuclear quadrupole double resonance (NQDR) spectroscopies and, theoretically, with the density functional theory/quantum theory of atoms in molecules (DFT/QTAIM). The crystallographic structure of triclosan, which crystallises in space group P31 with one molecule in the asymmetric unit [a = 12.64100(10), b = 12.64100(10), c = 6.71630(10) Å], was solved with an X-ray and refined to a final R-factor of 2.81% at room temperature. The NQR frequencies of (35)Cl and (17)O were detected with the help of the density functional theory (DFT) assigned to particular chlorine and oxygen sites in the molecules of both compounds. The NQR frequencies at (35)Cl sites in chloroxylenol and triclosan were found to be more differentiated than frequencies at the (17)O site. The former better describes the substituent withdrawing effects connected to π-electron delocalization within the benzene rings and the influence of temperature; whereas, those at the (17)O site provide more information on O-H bond and intermolecular interactions pattern. The conformation adopted by diphenyl ether of triclosan in solid state was found to be typical of diphenyl ethers, but the opposite to those adopted when it was bound to different inhibitors. According to an X-ray study, temperature had no effect on the conformation of the diphenyl ring of triclosan, which was the same at 90 K and at room temperature (RT). The scattering of NQR frequencies reproduced by the DFT under assumption of the X-ray data at 90 K and RT is found to be a good indicator of the quality of resolution of the crystallographic structure.
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Molin L, Seraglia R, Czarnocki Z, Maurin JK, Pluciński FA, Traldi P. On the Primary Ionization Mechanism(s) in Matrix-Assisted Laser Desorption Ionization. JOURNAL OF ANALYTICAL METHODS IN CHEMISTRY 2012; 2012:161865. [PMID: 23251835 PMCID: PMC3515899 DOI: 10.1155/2012/161865] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2012] [Accepted: 10/19/2012] [Indexed: 05/03/2023]
Abstract
A mechanism is proposed for the first step of ionization occurring in matrix-assisted laser desorption ionization, leading to protonated and deprotonated matrix (Ma) molecules ([Ma + H](+) and [Ma - H](-) ions). It is based on observation that in solid state, for carboxyl-containing MALDI matrices, the molecules form strong hydrogen bonds and their carboxylic groups can act as both donors and acceptors. This behavior leads to stable dimeric structures. The laser irradiation leads to the cleavage of these hydrogen bonds, and theoretical calculations show that both [Ma + H](+) and [Ma - H](-) ions can be formed through a two-photon absorption process. Alternatively, by the absorption of one photon only, a heterodissociation of one of the O-H bonds can lead to a stable structure containing both cationic and anionic sites. This structure could be considered an intermediate that, through the absorption of a further photon, leads to the formation of matrix ions. Some experiments have been performed to evaluate the role of thermal ionization and indicate that its effect is negligible. Some differences have been observed for different matrices in the formation of analyte molecule (M) ion [M + H](+), [M - H](-), M(+•), and [M - 2H](-•), and they have been explained in terms of ionization energies, pKa values, and thermodynamic stability.
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Krawczyk KK, Madej D, Maurin JK, Czarnocki Z. l-Prolinol as a chiral auxiliary in the photochemical synthesis of a new aryltetraline lignan analogue. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.tetasy.2011.06.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Krawczyk KK, Wojtasiewicz K, Maurin JK, Gronowska E, Czarnocki Z. Trimethyl-3-meth-oxy-4-oxo-5-triphenyl-phospho-ranyl-idene-cyclo-pent-1-ene-1,2,3-tricarboxyl-ate. Acta Crystallogr Sect E Struct Rep Online 2010; 66:o2792. [PMID: 21588989 PMCID: PMC3009217 DOI: 10.1107/s1600536810037815] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2010] [Accepted: 09/21/2010] [Indexed: 11/15/2022]
Abstract
The title compound, C30H27O8P (2), was formed as one of two products {(1) [Krawczyk et al. (2010 ▶). Acta Cryst. E66 (cv2752)] and (2)} in the reaction of dimethyl acetylenedicarboxylate with triphenylphosphine. The molecule of (2) consists of a five-membered carbocyclic ring. The P atom is a part of a triphenylphosphoranylidene substituent. In contrast to (1), the five-membered ring of (2) is planar, the r.m.s. deviation being only 0.009 (2) Å.
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Krawczyk KK, Wojtasiewicz K, Maurin JK, Gronowska E, Czarnocki Z. Tetra-methyl 1,1,2-triphenyl-2H-1λ-phosphole-2,3,4,5-tetra-carboxyl-ate. Acta Crystallogr Sect E Struct Rep Online 2010; 66:o2791. [PMID: 21588988 PMCID: PMC3008977 DOI: 10.1107/s1600536810037827] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2010] [Accepted: 09/21/2010] [Indexed: 11/10/2022]
Abstract
The title compound, C(30)H(27)O(8)P (1), was formed as one of two products {(1) and (2) [Krawczyk et al. (2010 ▶). Acta Cryst. E66 (cv2753)]} in the reaction of dimethyl acetyl-enedicarboxyl-ate with triphenyl-phosphine. The mol-ecule of (1) consists of a five-membered ring, in which the P atom is incorporated. One of the phenyl groups of the triphenyl-phosphine migrated to a vicinal C atom during the reaction. The five-membered ring of (1) is corrugated [r.m.s. deviation = 0.0719 (8) Å], whereas that in compound (2) is planar, the r.m.s. deviation being only 0.009 (2) Å.
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Komsta Ł, Maurin JK. Recognition of active ingredients in tablets by chemometric processing of X-ray diffractometric data. Talanta 2010; 82:850-3. [DOI: 10.1016/j.talanta.2010.05.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2010] [Revised: 04/26/2010] [Accepted: 05/10/2010] [Indexed: 10/19/2022]
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Pawłowski M, Lendzion A, Szawkało J, Leniewski A, Maurin JK, Czarnocki Z. Synthesis and Structure Determination of Some Monothio- and Dithioimides Derived from Succinic and Glutaric Acids. PHOSPHORUS SULFUR 2009. [DOI: 10.1080/10426500902856404] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Pawłowska J, Krawczyk KK, Wojtasiewicz K, Maurin JK, Czarnocki Z. (S)-(−)-α-Methylbenzylamine as chiral auxiliary in the synthesis of (+)-lortalamine. MONATSHEFTE FUR CHEMIE 2008. [DOI: 10.1007/s00706-008-0017-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Siwicka A, Moleda Z, Wojtasiewicz K, Zawadzka A, Maurin JK, Panasiewicz M, Pacuszka T, Czarnocki Z. The oxidation products of melatonin derivatives exhibit acetylcholinesterase and butyrylcholinesterase inhibitory activity. J Pineal Res 2008; 45:40-9. [PMID: 18284552 DOI: 10.1111/j.1600-079x.2008.00554.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
It is already well documented that melatonin exhibits strong antioxidant properties. It traps several reactive oxygen species including singlet oxygen, peroxyl and hydroxyl radicals. Also, peroxynitrite-induced reactions are inhibited by melatonin. The oxidation of melatonin by singlet molecular oxygen [O(2) ((1)Delta(g))] may produce cyclic 3-hydroxymelatonin whose structure we have already studied. In this investigation we report on the synthesis of several melatonin analogues having a carbamate substituent instead of the methoxy group at 5 position of the indole ring. These compounds behave analogously to melatonin with respect to singlet oxygen and produce the corresponding cyclic 3-hydroxymelatonin analogues. The structures of the products were investigated with spectral methods and X-ray crystallography. The compounds obtained possess the 2,3,8,8a-tetrahydropyrrolo[2,3-b]indole heterocyclic system which is a structural motif characteristic of alkaloids, physostigmine and phenserine, that are potent acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) inhibitors used in the Alzheimer's disease treatment. We measured the inhibitory activity of the obtained compounds against AChE and BChE from human erythrocytes and serum. In the case of the compounds having a phenylcarbamate and methoxyphenylcarbamate substituents, the inhibitory activity (IC(50)) ranged from 0.252 +/- 0.033 to 3.804 +/- 0.581 microM. Other compounds were less active and showed rather complex interactions with the structure-activity relationship in need of further investigation.
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Balzarini J, Orzeszko-Krzesińska B, Maurin JK, Orzeszko A. Synthesis and anti-HIV studies of 2- and 3-adamantyl-substituted thiazolidin-4-ones. Eur J Med Chem 2008; 44:303-11. [PMID: 18420310 PMCID: PMC7127420 DOI: 10.1016/j.ejmech.2008.02.039] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2007] [Revised: 02/25/2008] [Accepted: 02/26/2008] [Indexed: 10/31/2022]
Abstract
A series of novel thiazolidin-4-ones bearing a lipophilic adamantyl substituent at position 2 or 3 were synthesized. A majority of them showed a modest anti-HIV-1 activity, whereas 2-adamantan-1-yl-3-(4,6-dimethylpyrimidin-2-yl)-thiazolidin-4-one (8) was endowed with a remarkable antiviral potency (EC(50)=0.67 microM). The new series of compounds (22-29) with an adamantyl moiety at the 3-position of the thiazolidinone ring showed good to modest anti-HIV-1 activity (EC(50)=1.0-11 microM) but also pronounced cytostatic activity. For example 24, 26 and 29 showed an EC(50) of 1.0-2.0 microM, while the 50% effective concentrations for 23 and 28 were 7.8 and 11.0 microM, respectively. X-ray studies and quantum chemical calculations revealed that the anti-HIV activity of the compounds strongly depends on their dipole moments and conformation of the thiazolidinones.
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Czarnocki SJ, Wojtasiewicz K, Jóźwiak AP, Maurin JK, Czarnocki Z, Drabowicz J. Enantioselective synthesis of (+)-trypargine and (+)-crispine E. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.01.088] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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