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Shaw R, Sihag N, Jain S, Sharma R, Yadav MR. Photoinduced Alkyl/Aryl Radical Cascade for the Synthesis of Quaternary CF 3-Containing Oxindoles and Indoline Alkaloids. J Org Chem 2023; 88:5652-5660. [PMID: 37068047 DOI: 10.1021/acs.joc.3c00141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/18/2023]
Abstract
Metal- and additive-free, photoinduced decarboxylative radical alkylation-cyclization of CF3-acrylamides with alkyl redox-active esters provided the corresponding quaternary CF3-oxindole derivatives in good yields. Notably, diaryliodonium salts also efficiently participated in the arylation-cyclization of CF3-acrylamides in environmentally benign H2O as a solvent. The present approach has been extended for the concise synthesis of CF3-attached indoline alkaloid analogues, i.e., CF3-(±)-desoxyeseroline, CF3-(±)-esermethole, and CF3-(±) progesterone receptor antagonists. The preliminary mechanistic studies revealed that the reaction is likely to proceed through initial photoexcitation of redox-active ester/diaryliodonium salts followed by the SET process with acrylamide.
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Affiliation(s)
- Ranjay Shaw
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Naveen Sihag
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Swati Jain
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Ruchi Sharma
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - M Ramu Yadav
- Department of Chemistry, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
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Gonzaga DTG, Oliveira FH, von Ranke NL, Pinho GQ, Salles JP, Bello ML, Rodrigues CR, Castro HC, de Souza HVCM, Reis CRC, Leme RPP, Mafra JCM, Pinheiro LCS, Hoelz LVB, Boechat N, Faria RX. Synthesis, Biological Evaluation, and Molecular Modeling Studies of New Thiadiazole Derivatives as Potent P2X7 Receptor Inhibitors. Front Chem 2019; 7:261. [PMID: 31134177 PMCID: PMC6511888 DOI: 10.3389/fchem.2019.00261] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 04/01/2019] [Indexed: 01/01/2023] Open
Abstract
Twenty new 2-(1H-pyrazol-1-yl)-1,3,4-thiadiazole analogs were synthetized to develop P2X7 receptor (P2X7R) inhibitors. P2X7R inhibition in vitro was evaluated in mouse peritoneal macrophages, HEK-293 cells transfected with hP2X7R (dye uptake assay), and THP-1 cells (IL-1β release assay). The 1-(5-phenyl-1,3,4-thiadiazol-2-yl)-1H-pyrazol-5-amine derivatives 9b, 9c, and 9f, and 2-(3,5-dimethyl-1H-pyrazol-1-yl)-5-(4-fluorophenyl)-1,3,4-thiadiazole (11c) showed inhibitory effects with IC50 values ranging from 16 to 122 nM for reduced P2X7R-mediated dye uptake and 20 to 300 nM for IL-1β release. In addition, the in vitro ADMET profile of the four most potent derivatives was determined to be in acceptable ranges concerning metabolic stability and cytotoxicity. Molecular docking and molecular dynamics simulation studies of the molecular complexes human P2X7R/9f and murine P2X7R/9f indicated the putative intermolecular interactions. Compound 9f showed affinity mainly for the Arg268, Lys377, and Asn266 residues. These results suggest that 2-(1H-pyrazol-1-yl)-1,3,4-thiadiazole analogs may be promising novel P2X7R inhibitors with therapeutic potential.
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Affiliation(s)
- Daniel T G Gonzaga
- Departamento de Síntese de Fármacos Manguinhos, Fundação Oswaldo Cruz, Instituto de Tecnologia em Fármacos, Farmanguinhos-Fiocruz, Rio de Janeiro, Brazil.,Instituto Biomédico, Centro Universitário Estadual da Zona Oeste, Rio de Janeiro, Brazil
| | - Felipe H Oliveira
- Laboratório de Toxoplasmose e Outras Protozooses, Fundação Oswaldo Cruz, Instituto Oswaldo Cruz, Rio de Janeiro, Brazil
| | - N L von Ranke
- Departamento de Fármacos e Medicamentos, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - G Q Pinho
- Laboratório de Toxoplasmose e Outras Protozooses, Fundação Oswaldo Cruz, Instituto Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Juliana P Salles
- Laboratório de Toxoplasmose e Outras Protozooses, Fundação Oswaldo Cruz, Instituto Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Murilo L Bello
- Departamento de Fármacos e Medicamentos, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Carlos R Rodrigues
- Departamento de Fármacos e Medicamentos, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Helena C Castro
- Laboratório de Antibióticos, Bioquímica, Ensino e Modelagem Molecular-LABiEMol, Universidade Federal Fluminense, Niterói, Brazil
| | - Hellen V C M de Souza
- Departamento de Síntese de Fármacos Manguinhos, Fundação Oswaldo Cruz, Instituto de Tecnologia em Fármacos, Farmanguinhos-Fiocruz, Rio de Janeiro, Brazil
| | - Caroline R C Reis
- Departamento de Síntese de Fármacos Manguinhos, Fundação Oswaldo Cruz, Instituto de Tecnologia em Fármacos, Farmanguinhos-Fiocruz, Rio de Janeiro, Brazil
| | - Rennan P P Leme
- Departamento de Síntese de Fármacos Manguinhos, Fundação Oswaldo Cruz, Instituto de Tecnologia em Fármacos, Farmanguinhos-Fiocruz, Rio de Janeiro, Brazil
| | - João C M Mafra
- Departamento de Síntese de Fármacos Manguinhos, Fundação Oswaldo Cruz, Instituto de Tecnologia em Fármacos, Farmanguinhos-Fiocruz, Rio de Janeiro, Brazil
| | - Luiz C S Pinheiro
- Departamento de Síntese de Fármacos Manguinhos, Fundação Oswaldo Cruz, Instituto de Tecnologia em Fármacos, Farmanguinhos-Fiocruz, Rio de Janeiro, Brazil
| | - Lucas V B Hoelz
- Departamento de Síntese de Fármacos Manguinhos, Fundação Oswaldo Cruz, Instituto de Tecnologia em Fármacos, Farmanguinhos-Fiocruz, Rio de Janeiro, Brazil
| | - Nubia Boechat
- Departamento de Síntese de Fármacos Manguinhos, Fundação Oswaldo Cruz, Instituto de Tecnologia em Fármacos, Farmanguinhos-Fiocruz, Rio de Janeiro, Brazil
| | - Robson X Faria
- Instituto Biomédico, Centro Universitário Estadual da Zona Oeste, Rio de Janeiro, Brazil
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