51
|
Campillo N, Páez J, Goya P. On the Reactivity of 1H-Pyrazino[2,3-c][1,2,6]thiadiazine 2,2-Dioxide and Derivatives: Nucleophilic Substitution, Amination, Aldol-Type Condensation, Oxidation, and Hydrolysis. Helv Chim Acta 2003. [DOI: 10.1002/hlca.200390003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
52
|
Girón R, Abalo R, Goicoechea C, Martín MI, Callado LF, Cano C, Goya P, Jagerovic N. Synthesis and opioid activity of new fentanyl analogs. Life Sci 2002; 71:1023-34. [PMID: 12088762 DOI: 10.1016/s0024-3205(02)01798-8] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Three new fentanyl analogs (compounds 3-4-5) have been synthesized and evaluated for antinociceptive properties using the writhing test. The analgesic property of the active compound, N-[1-phenylpyrazol-3-yl]-N-[1-(2-phenethyl)-4-piperidyl)] propenamide (compound 4), was tested using the hot plate test in mice. Its opioid agonistic activity was characterized using three isolated tissues: guinea pig ileum, mouse vas deferens, and rabbit vas deferens. Compound 4 was as effective as fentanyl or morphine and it showed less antinociceptive potency than fentanyl but it was more potent than morphine. The duration of the antinociception was similar to that of fentanyl. This compound inhibited the electrically evoked contractions of myenteric plexus-longitudinal muscle strips of guinea pig ileum and of mouse vas deferens but not those of rabbit vas deferens. These effects could be reversed by micro selective antagonists (naloxone and/or CTOP) but not by the delta selective antagonist naltrindole, thus indicating that the compound acted as a micro opioid agonist. Finally, the binding data confirmed that compound 4 had high affinity and selectivity for the micro-receptor.
Collapse
|
53
|
Campillo N, Páez J, Goya P. Unconventional Alkoxylation of Pyrazino[2,3-c][1,2,6]thiadiazine 2,2-Dioxides Mediated by N-Halosuccinimides. European J Org Chem 2002. [DOI: 10.1002/1099-0690(200207)2002:13<2109::aid-ejoc2109>3.0.co;2-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
54
|
Montero A, Goya P, Jagerovic N, Callado LF, Meana JJ, Girón R, Goicoechea C, Martín MI. Guanidinium and aminoimidazolinium derivatives of N-(4-piperidyl)propanamides as potential ligands for mu opioid and I2-imidazoline receptors: synthesis and pharmacological screening. Bioorg Med Chem 2002; 10:1009-18. [PMID: 11836109 DOI: 10.1016/s0968-0896(01)00356-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Derivatives of N-(1-phenethyl-4-piperidyl)propanamides incorporating guanidinium and 2-aminoimidazolinium groups have been prepared by a synthetic approach involving first introduction of a spacer between the piperidine and the functional group by reductive amination of piperidinone. The formation of each of these functional groups was carried out using N-N'-di(tert-butoxycarbonyl)thiourea and 2-methylthioimidazolinium iodide, respectively. These structures have been designed to incorporate two pharmacologic goals into one entity. Radioligand binding assays have been used to study their affinity for opioid (mu, delta and kappa) and I2-imidazoline receptors. Two of them, 10 and 16, showed high affinity for mu opioid receptors and functionally they had moderate analgesic properties in the hot plate and writhing tests. The in vitro studies on guinea pig ileum (GPI) indicated that both compounds are mu opioid agonists. In what concerns I2-imidazoline receptor activity, these derivatives showed low affinity around 6 to 7 times less than idazoxan.
Collapse
|
55
|
Jagerovic N, Cano C, Elguero J, Goya P, Callado LF, Meana JJ, Girón R, Abalo R, Ruiz D, Goicoechea C, Martín MAI. Long-acting fentanyl analogues: synthesis and pharmacology of N-(1-phenylpyrazolyl)-N-(1-phenylalkyl-4-piperidyl)propanamides. Bioorg Med Chem 2002; 10:817-27. [PMID: 11814871 DOI: 10.1016/s0968-0896(01)00345-5] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of new fentanyl analogues in which the benzene ring of the propioanilido group has been replaced by phenylpyrazole is described. Antinociceptive activity was evaluated using the writhing and hot plate tests in mice. Two compounds, and, showed interesting analgesic properties, being more potent than morphine and less than fentanyl but with longer duration of action. These compounds inhibited the electrically evoked muscle contraction of guinea pig ileum and mouse vas deferens but not that of rabbit vas deferens and the effects could be reversed by antagonists (naloxone and/or CTOP), thus indicating that the compounds acted as mu agonists. Finally, the binding data confirmed that the compounds had high affinity and selectivity for the mu receptor.
Collapse
|
56
|
Campillo N, García C, Goya P, Alkorta I, Páez JA. Novel bronchodilators: synthesis, transamination reactions, and pharmacology of a series of pyrazino[2,3-c][1,2,6]thiadiazine 2, 2-dioxides. J Med Chem 2000; 43:4219-27. [PMID: 11063618 DOI: 10.1021/jm000970x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The synthesis, pharmacological evaluation, and structure-activity relationships of a new class of bronchodilator agents, derivatives of pyrazino[2,3-c][1,2,6]thiadiazine 2,2-dioxides are described. The compounds were prepared by reaction of 3,4,5-triamino-1,2, 6-thiadiazine 1,1-dioxide with suitable 1,2-dicarbonyl compounds or alpha-hydroxyiminoketones and subsequent N-alkylation. A transamination procedure for synthesizing derivatives with different substituents at the 4-amino group is reported for the first time. The pyrazino[2,3-c][1,2,6]thiadiazine derivatives were screened for tracheal relaxing activity in vitro, and the active compounds were evaluated in vivo in guinea pigs as bronchodilator agents in comparison to theophylline. Among the compounds studied, the most interesting properties were displayed by the 4-amino-1-ethyl-6-methyl derivative (21). The toxicological evaluation of this derivative is also reported.
Collapse
|
57
|
Dardonville C, Goya P, Rozas I, Alsasua A, Martín MI, Borrego MJ. New aromatic iminoimidazolidine derivatives as alpha1-adrenoceptor antagonists: a novel synthetic approach and pharmacological activity. Bioorg Med Chem 2000; 8:1567-77. [PMID: 10976505 DOI: 10.1016/s0968-0896(00)00089-4] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The design, synthesis and alpha1-adrenoceptor antagonism of a series of bis-imidazoline (1a, 2a, 3a and 4a) and bis-guanidine (1b, 2b, 3b and 4b) diphenyl derivatives are reported. All of these compounds fulfill the conditions of the most recent pharmacophore proposed for alpha1-adrenoceptors and found in the literature. Besides, a novel synthetic approach to the preparation of 2-(arylimino)imidazolidine derivatives is described. All the tested compounds, except the bis-guanidinium derivative 3b, inhibit the contractile responses induced by noradrenaline in aortic rings of rat and rabbit in a dose-dependent manner. Our results indicate that, even though some discrepancies are observed in terms of the alpha1 subtype targeted by this new family of compounds, they show an interesting profile as antagonists of alpha1-adrenoceptors and a new prototype, compound 1a, has been found deserving further development.
Collapse
MESH Headings
- Adrenergic alpha-Antagonists/chemical synthesis
- Adrenergic alpha-Antagonists/chemistry
- Adrenergic alpha-Antagonists/pharmacology
- Animals
- Aorta, Thoracic/chemistry
- Aorta, Thoracic/drug effects
- Aorta, Thoracic/physiology
- Bradykinin/pharmacology
- Dose-Response Relationship, Drug
- Female
- Guanidine/analogs & derivatives
- Guanidine/chemistry
- Guanidine/pharmacology
- Guinea Pigs
- Imidazoles/chemical synthesis
- Imidazoles/chemistry
- Imidazoles/pharmacology
- Imines/chemical synthesis
- Imines/chemistry
- Imines/pharmacology
- Inhibitory Concentration 50
- Male
- Models, Molecular
- Muscle Contraction/drug effects
- Muscle, Skeletal/chemistry
- Muscle, Skeletal/drug effects
- Muscle, Smooth, Vascular/physiology
- Norepinephrine/antagonists & inhibitors
- Norepinephrine/pharmacology
- Rabbits
- Rats
- Receptors, Adrenergic, alpha/metabolism
- Structure-Activity Relationship
- Vasoconstriction/drug effects
- Vasoconstrictor Agents/antagonists & inhibitors
- Vasoconstrictor Agents/pharmacology
Collapse
|
58
|
Campillo N, Goya P, Páez JA. Novel arylpyrazino[2,3-c][1,2,6]thiadiazine 2,2-dioxides as platelet aggregation inhibitors. 2. Optimization by quantitative structure-activity relationships. J Med Chem 1999; 42:3279-88. [PMID: 10464014 DOI: 10.1021/jm981104b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In the previous paper (Part 1), we described the synthesis and antiplatelet activity of a series of phenyl- and heteroarylpyrazino[2,3-c][1,2,6]thiadiazine 2,2-dioxides. In this paper, we report the optimization of the platelet aggregation inhibitory activity by an iterative sequence of quantitative structure-activity relationship studies which encompassed synthesis and evaluation of the effects of structure variations at the 1-, 6-, and 7-positions of the heterocyclic system. A model has been established that correctly correlates antiplatelet activity in this series with the partial atomic charges calculated by a local density functional ab initio method. As a result of this study, the experimental platelet aggregation inhibitory activity of the lead compound was improved 300-fold.
Collapse
|
59
|
Campillo N, García C, Goya P, Páez JA, Carrasco E, Grau M. Novel arylpyrazino[2,3-c][1,2,6]thiadiazine 2,2-dioxides as inhibitors of platelet aggregation. 1. Synthesis and pharmacological evaluation. J Med Chem 1999; 42:1698-704. [PMID: 10346922 DOI: 10.1021/jm981103j] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of N-1-substituted derivatives of pyrazino[2,3-c][1,2, 6]thiadiazine 2,2-dioxides bearing aryl groups at the pyrazino moiety have been prepared. The synthesis involves ring formation between the diaminothiadiazine and suitable dicarbonyl compounds and subsequent introduction of the substituent at N-1. The compounds have been tested in vitro, as inhibitors of rabbit and human platelet aggregation, and ex vivo against rat platelet aggregation induced by arachidonic acid, ADP, collagen, U46619, and I-BOP. The results obtained indicate that some pyrazino[2,3-c][1,2, 6]thiadiazine derivatives show significant platelet aggregation inhibition similar to other antithrombotic agents and that the antiplatelet properties may be mediated by interference with the arachidonic acid pathway.
Collapse
|
60
|
Juanes O, Goya P, Martinez A. Towards lipophilic derivatives of S-adenosyl-L-methionine. J Heterocycl Chem 1998. [DOI: 10.1002/jhet.5570350338] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
61
|
A. Páez J, Campillo N, de la Cruz A, Goya P. A Novel Tetracyclic System Containing the 1,2,6-Thiadiazine Ring: Synthesis, Structural Assignment and Tautomeric Studies. HETEROCYCLES 1998. [DOI: 10.3987/com-98-8216] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
62
|
Campillo N, Antonio Páez J, Alkorta I, Goya P. A theoretical study of epibatidine. ACTA ACUST UNITED AC 1998. [DOI: 10.1039/a806255b] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
63
|
Campillo N, Alkorta I, Antonio Páez J, Goya P. Solvent effect on the tautomerism of 4-aminopyrazino[2,3-c][1,2,6]thiadiazine 2,2-dioxides. ACTA ACUST UNITED AC 1998. [DOI: 10.1039/a803576h] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
64
|
Goya P, Campillo N, García-Gómez C, Páez JA, Alkorta I. Heterocyclic structures useful in medicinal chemistry: the case of pyrazino[2,3-c][1,2,6]thiadiazine 2,2-dioxide. FARMACO (SOCIETA CHIMICA ITALIANA : 1989) 1997; 52:283-7. [PMID: 9273999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Different aspects of a particular kind of heterocycle, namely pyrazino[2,3-c][1,2,6]thiadiazine 2,2-dioxide are discussed. These include synthesis, reactivity, tautomerism and acid-base properties, results of x-ray analysis and molecular orbital calcultations. Besides, some of the derivatives have shown interesting biological effects, among which are the diuretic properties which are also presented.
Collapse
|
65
|
Alcalde E, Barat A, Goya P, Martinez A, Ramirez G, Roca T, Rozas I. Molecular modeling of (E)-1-alkyl-4(3)-[2-(1H-azolyl)vinyl]-pyridinium salts and evaluation of their behavior towards choline acetyltransferase. Bioorg Med Chem 1997; 5:949-54. [PMID: 9208104 DOI: 10.1016/s0968-0896(97)00033-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A new type of extended pi-system aza-analogue of (E)-4-[2-(1-naphthylvinyl)]-1-substituted pyridinium salts (NVP+) has been designed and its inhibitory activity towards choline acetyltransferase (ChAT) has been evaluated in vitro. Among the several examples of the title quaternary salts synthesized 2 and 3, the indolylvinylpyridinium salt 2e is the only one to show a very low ChAT inhibition. The molecular modeling study is highly illustrative of their behavior towards ChAT and interaction with the recognition site. Thus, several selected cations together with the reference NVP+ compound 1a were studied at the PM3 and AM1 levels respectively. At the global minima, all the compounds are planar, which, from the electron charge distribution, shows a degree of polarization similar to the NVP+ model compound 1a. However, the fitting of all optimized structures indicated that only the indole derivative 2e showed the same aromatic fragment orientation as 1a, which allows us to define a volume that is not accessible to ligands in the enzyme and consequently to a refined model of the choline acetyltransferase recognition site.
Collapse
|
66
|
Alkorta I, Garc�a-G�mez C, P�ez JA, Goya P. Theoretical and experimental analysis of properties in heterocycles containing the aminosulphonylamino moiety. J PHYS ORG CHEM 1996. [DOI: 10.1002/(sici)1099-1395(199604)9:4<203::aid-poc771>3.0.co;2-k] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
67
|
Esteban AI, Juanes O, Conde S, Goya P, De Clercq E, Martínez A. New 1,2,6-thiadiazine dioxide acyclonucleosides: synthesis and antiviral evaluation. Bioorg Med Chem 1995; 3:1527-35. [PMID: 8634833 DOI: 10.1016/0968-0896(95)00140-c] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
New acyclonucleosides derived from 1,2,6-thiadiazine dioxide systems have been synthesized. Lipase-mediated deacylation procedure was used to obtain the deprotected derivatives. All the newly prepared compounds were tested as antiviral agents, but none of them showed significant activity.
Collapse
|
68
|
de la Cruz A, Goya P, Páez JA, Martínez-Ripoll M. Synthesis and X-ray Analysis of a Sulfur Dioxide Analog of Triamterene. European J Org Chem 1994. [DOI: 10.1002/jlac.199419940615] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
69
|
de la Cruz A, Elguero J, Goya P, Martinez A. Synthesis and antimicrobial evaluation of new derivatives of diphenylsulfone. BOLLETTINO CHIMICO FARMACEUTICO 1994; 133:72-5. [PMID: 8003284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
New derivatives of diphenylsulfone have been synthesized and their antibacterial and antifungal activities evaluated. Their chemical structures have been established by means of analytical and NMR spectroscopic data.
Collapse
|
70
|
Klein JF, Pommelet JC, Chuche J, Elguero J, Goya P, Martinez A. SO2 extrusion in 1,2,6-thiadiazine 1,1-dioxides: a novel synthesis of pyrazoles. CAN J CHEM 1993. [DOI: 10.1139/v93-060] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A novel synthesis of the pyrazole ring involving SO2 extrusion by flow vacuum pyrolysis in the 1,2,6-thiadiazine 1,1-dioxide system is described. The reaction has potential industrial significance for routes to pyrazoles or functionalized pyrazoles that do not involve hydrazines.
Collapse
|
71
|
de la Cruz A, Elguero J, Goya P, Martineza A, De Clercq E. Synthesis and biological evaluation of 4-quinolone ribosides. ACTA ACUST UNITED AC 1993. [DOI: 10.1039/p19930000845] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
72
|
Alcalde E, Roca T, Barat A, Ramirez G, Goya P, Martinez A. (E)-1-alkyl-[2-(1H-azol-2-yl)vinyl]pyridinium salts: theoretical analysis, synthesis and evaluation of their interaction with choline acetyltransferase. Bioorg Med Chem Lett 1992. [DOI: 10.1016/s0960-894x(00)80415-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
73
|
Goya P, Paez JA, Alkorta I, Carrasco E, Grau M, Anton F, Julia S, Martinez-Ripoll M. N-substituted pyrazino[2,3-c][1,2,6]thiadiazine 2,2-dioxides. A new class of diuretics. J Med Chem 1992; 35:3977-83. [PMID: 1433206 DOI: 10.1021/jm00100a001] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The synthesis and evaluation of a new class of diuretic agents derived from the pyrazino[2,3-c][1,2,6]thiadiazine 2,2-dioxide ring system are described. Preliminary structure-activity relationships indicate that the nature and location of the substituents at different positions of the heterocycle are crucial for activity. Thus, a novel synthetic methodology has been developed to selectively introduce the desired substituents at different positions. From the study of the pharmacological properties (dose-response curves, duration of action, and acute toxicity) of the most active compounds, 4-amino-1,7-diethyl-6-methylpyrazino[2,3-c][1,2,6]thiadiazine++ + 2,2-dioxide (9) was selected for further investigation. Compound 9 (C10H15N5O2S) crystallizes in space group P21/a with unit cell dimensions a = 16.482 (1), b = 9.3484 (3), c = 8.333 (3) A, beta = 103.003 (3) degrees, Z = 4.
Collapse
|
74
|
de la Cruz A, Elguero J, Gotor V, Goya P, Martínez A, Moris F. Lipase-Mediated Acylation of Acyclonucleosides. Application to Novel Fluoroquinolone Derivatives. SYNTHETIC COMMUN 1991. [DOI: 10.1080/00397919108016421] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
75
|
Alkorta I, Goya P, Páez JA, Pérez C. Pyrazino[2,3-c]-1,2,6-thiadiazine 2,2-dioxides. Synthesis of SO2 analogues of folic acid antagonists. European J Org Chem 1991. [DOI: 10.1002/jlac.199119910152] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|