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Rosales-Amezcua SC, Ballinas-Indili R, López-Reyes ME, Guevara-Vela JM, Rocha-Rinza T, Toscano RA, Álvarez-Toledano C. Synthesis of Functionalized Tetrasubstituted Allenes by the Addition of Bis(trimethylsilyl)ketene Acetals to Ynones Catalyzed by Gold(I). J Org Chem 2024; 89:3092-3101. [PMID: 38359145 DOI: 10.1021/acs.joc.3c02550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
We have developed a straightforward and rapid methodology for the synthesis of tetrasubstituted allenes bearing carboxylic acids in the 1,3-position through the gold(I)-catalyzed nucleophilic addition of bis(trimethylsilyl)ketene acetals to ynones. The reaction was evaluated with several substrates, and 21 allenes were obtained in moderate to good yields. Using DFT calculations, we studied the mechanism of the reaction, which suggested a nucleophilic 1,4-addition pathway. The potential of allenes to act as a source of highly functionalized lactones was also explored.
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Affiliation(s)
- Saulo C Rosales-Amezcua
- Instituto de Química, Universidad Nacional Autónoma de México (UNAM), Circuito Exterior s/n, Ciudad Universitaria, Cd. de México 04510, Mexico
| | - Ricardo Ballinas-Indili
- Instituto de Química, Universidad Nacional Autónoma de México (UNAM), Circuito Exterior s/n, Ciudad Universitaria, Cd. de México 04510, Mexico
| | - Morelia E López-Reyes
- Departamento de Química, Universidad de Guadalajara, Blvd. Marcelino García Barragán 1421, Guadalajara 44430, Mexico
| | - José Manuel Guevara-Vela
- Departamento de Química Física Aplicada, Universidad Autónoma de Madrid, Francisco Tomás y Valiente, 7, Madrid 28049, Spain
| | - Tomás Rocha-Rinza
- Instituto de Química, Universidad Nacional Autónoma de México (UNAM), Circuito Exterior s/n, Ciudad Universitaria, Cd. de México 04510, Mexico
| | - Rúben A Toscano
- Instituto de Química, Universidad Nacional Autónoma de México (UNAM), Circuito Exterior s/n, Ciudad Universitaria, Cd. de México 04510, Mexico
| | - Cecilio Álvarez-Toledano
- Instituto de Química, Universidad Nacional Autónoma de México (UNAM), Circuito Exterior s/n, Ciudad Universitaria, Cd. de México 04510, Mexico
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Lomov DA, Abramyants MG, Zaporozhets OO, Pekhtereva TM. Alternative Synthesis of the Alkaloid Guvacine and Its Derivatives. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2022. [DOI: 10.1134/s1070428022060057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Singh K, Kumar P, Bhatia R, Mehta V, Kumar B, Akhtar MJ. Nipecotic acid as potential lead molecule for the development of GABA uptake inhibitors; structural insights and design strategies. Eur J Med Chem 2022; 234:114269. [DOI: 10.1016/j.ejmech.2022.114269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Revised: 03/05/2022] [Accepted: 03/05/2022] [Indexed: 11/04/2022]
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Yakovenko GG, Saliyeva LN, Rusanov EB, Donchak IS, Vovk MV. Synthesis of methyl(ethyl) pyrazolo[4,3-b]pyridine-6-carboxylates and their conversion to tert-butyl 4,5,6,7-tetrahydropyrazolo-[4,3-b]pyridine-6-carboxylates. Chem Heterocycl Compd (N Y) 2022. [DOI: 10.1007/s10593-021-03032-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Matulevičiūtė G, Arbačiauskienė E, Kleizienė N, Kederienė V, Ragaitė G, Dagilienė M, Bieliauskas A, Milišiūnaitė V, Sløk FA, Šačkus A. Synthesis and Characterization of Novel Methyl (3)5-( N-Boc-piperidinyl)-1 H-pyrazole-4-carboxylates. Molecules 2021; 26:molecules26133808. [PMID: 34206593 PMCID: PMC8270337 DOI: 10.3390/molecules26133808] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 06/13/2021] [Accepted: 06/19/2021] [Indexed: 11/16/2022] Open
Abstract
Series of methyl 3- and 5-(N-Boc-piperidinyl)-1H-pyrazole-4-carboxylates were developed and regioselectively synthesized as novel heterocyclic amino acids in their N-Boc protected ester form for achiral and chiral building blocks. In the first stage of the synthesis, piperidine-4-carboxylic and (R)- and (S)-piperidine-3-carboxylic acids were converted to the corresponding β-keto esters, which were then treated with N,N-dimethylformamide dimethyl acetal. The subsequent reaction of β-enamine diketones with various N-mono-substituted hydrazines afforded the target 5-(N-Boc-piperidinyl)-1H-pyrazole-4-carboxylates as major products, and tautomeric NH-pyrazoles prepared from hydrazine hydrate were further N-alkylated with alkyl halides to give 3-(N-Boc-piperidinyl)-1H-pyrazole-4-carboxylates. The structures of the novel heterocyclic compounds were confirmed by 1H-, 13C-, and 15N-NMR spectroscopy and HRMS investigation.
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Affiliation(s)
- Gita Matulevičiūtė
- Institute of Synthetic Chemistry, Kaunas University of Technology, K. Baršausko g. 59, LT-51423 Kaunas, Lithuania; (G.M.); (N.K.); (G.R.); (M.D.); (A.B.); (V.M.)
- Department of Organic Chemistry, Kaunas University of Technology, Radvilėnų pl. 19, LT-50254 Kaunas, Lithuania;
| | - Eglė Arbačiauskienė
- Department of Organic Chemistry, Kaunas University of Technology, Radvilėnų pl. 19, LT-50254 Kaunas, Lithuania;
- Correspondence: (E.A.); (A.Š.); Tel.: +370-37-451-401 (A.Š.)
| | - Neringa Kleizienė
- Institute of Synthetic Chemistry, Kaunas University of Technology, K. Baršausko g. 59, LT-51423 Kaunas, Lithuania; (G.M.); (N.K.); (G.R.); (M.D.); (A.B.); (V.M.)
| | - Vilija Kederienė
- Department of Organic Chemistry, Kaunas University of Technology, Radvilėnų pl. 19, LT-50254 Kaunas, Lithuania;
| | - Greta Ragaitė
- Institute of Synthetic Chemistry, Kaunas University of Technology, K. Baršausko g. 59, LT-51423 Kaunas, Lithuania; (G.M.); (N.K.); (G.R.); (M.D.); (A.B.); (V.M.)
| | - Miglė Dagilienė
- Institute of Synthetic Chemistry, Kaunas University of Technology, K. Baršausko g. 59, LT-51423 Kaunas, Lithuania; (G.M.); (N.K.); (G.R.); (M.D.); (A.B.); (V.M.)
| | - Aurimas Bieliauskas
- Institute of Synthetic Chemistry, Kaunas University of Technology, K. Baršausko g. 59, LT-51423 Kaunas, Lithuania; (G.M.); (N.K.); (G.R.); (M.D.); (A.B.); (V.M.)
| | - Vaida Milišiūnaitė
- Institute of Synthetic Chemistry, Kaunas University of Technology, K. Baršausko g. 59, LT-51423 Kaunas, Lithuania; (G.M.); (N.K.); (G.R.); (M.D.); (A.B.); (V.M.)
| | - Frank A. Sløk
- Vipergen ApS, Gammel Kongevej 23A, V DK-1610 Copenhagen, Denmark;
| | - Algirdas Šačkus
- Institute of Synthetic Chemistry, Kaunas University of Technology, K. Baršausko g. 59, LT-51423 Kaunas, Lithuania; (G.M.); (N.K.); (G.R.); (M.D.); (A.B.); (V.M.)
- Correspondence: (E.A.); (A.Š.); Tel.: +370-37-451-401 (A.Š.)
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Synthesis and biological evaluation of novel N-substituted nipecotic acid derivatives with tricyclic cage structures in the lipophilic domain as GABA uptake inhibitors. Med Chem Res 2020. [DOI: 10.1007/s00044-020-02647-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
AbstractA new class of GABA reuptake inhibitors with sterically demanding, highly rigid tricyclic cage structures as the lipophilic domain was synthesized and investigated in regard to their biological activity at the murine GABA transporters (mGAT1–mGAT4). The construction of these compounds, consisting of nipecotic acid, a symmetric tricyclic amine, and a plain hydrocarbon linker connecting the two subunits via their amino nitrogens, was accomplished via reductive amination of a nipecotic acid derivative with an N-alkyl substituent displaying a terminal aldehyde function with tricyclic secondary amines. The target compounds varied with regard to spacer length, the bridge size of one of the bridges, and the substituents of the tricyclic skeleton to study the impact of these changes on their potency. Among the tested compounds nipecotic acid ethyl ester derivates with phenyl residues attached to the cage subunit showed reasonable inhibitory potency and subtype selectivity in favor of mGAT3 and mGAT4, respectively.
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