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Hufnagel B, Zhu WF, Franz HM, Proschak E, Hernandez‐Olmos V. Phenolate-Induced N-O Bond Formation versus TiemannType Rearrangement for the Synthesis of 3-Aminobenzisoxazoles and 2-Aminobenzoxazoles. Chemistry 2022; 11:e202200252. [PMID: 36564354 PMCID: PMC9789021 DOI: 10.1002/open.202200252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 11/30/2022] [Indexed: 12/25/2022]
Abstract
A novel oxadiazolone-based method for the synthesis of 3-aminobenzisoxazoles by N-O bond formation and of 2-aminobenzoxazoles through a Tiemann-type rearrangement has been developed. The synthesis of these two pharmaceutically relevant heterocycles was realized by an unexplored retrosynthetic disconnection using a cyclic nitrenoid precursor-based strategy. The selective formation of the two isomers was significantly influenced by steric and electronic effects of substituents. However, tetrabutylammonium chloride (TBACl) efficiently promoted the Tiemann-type rearrangement over N-O bond formation. Control experiments indicate that deprotonation of the phenol induces both rearrangements.
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Affiliation(s)
- Benedikt Hufnagel
- Institute of Pharmaceutical ChemistryGoethe University FrankfurtMax-von-Laue-Str. 960438Frankfurt am MainGermany
| | - W. Felix Zhu
- Institute of Pharmaceutical ChemistryGoethe University FrankfurtMax-von-Laue-Str. 960438Frankfurt am MainGermany
| | - Hanna M. Franz
- Institute of Pharmaceutical ChemistryGoethe University FrankfurtMax-von-Laue-Str. 960438Frankfurt am MainGermany
| | - Ewgenij Proschak
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMPTheodor-Stern-Kai 760596Frankfurt am MainGermany,Institute of Pharmaceutical ChemistryGoethe University FrankfurtMax-von-Laue-Str. 960438Frankfurt am MainGermany
| | - Victor Hernandez‐Olmos
- Fraunhofer Institute for Translational Medicine and Pharmacology ITMPTheodor-Stern-Kai 760596Frankfurt am MainGermany
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Orooji Y, Pakzad K, Nasrollahzadeh M, Tajbakhsh M. Novel magnetic lignosulfonate-supported Pd complex as an efficient nanocatalyst for N-arylation of 4-methylbenzenesulfonamide. Int J Biol Macromol 2021; 182:564-573. [PMID: 33798580 DOI: 10.1016/j.ijbiomac.2021.03.165] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 03/26/2021] [Accepted: 03/28/2021] [Indexed: 11/25/2022]
Abstract
This study presents a novel, economical, and environmentally technique for synthesizing magnetic palladium complex conjugated to activated calcium lignosulfonate with triethylenetetramine (Fe3O4@lignosulfonate@triethylenetetramine@Pd complex (FLT-Pd complex)) as a practical and air-stable catalyst. FLT-Pd complex is used as a catalyst for the fabrication of 4-methyl-N-phenyl-benzenesulfonamide derivatives via N-arylation of 4-methylbenzenesulfonamide in good yields. Furthermore, because of the complex magnetic reparability and high stability, it could be removed easily from the reaction media using a magnet and reused 5 cycles without a remarkable loss of catalytic prowess.
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Affiliation(s)
- Yasin Orooji
- College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China.
| | - Khatereh Pakzad
- Faculty of Chemistry, University of Mazandaran, Babolsar 47416-13534, Iran
| | | | - Mahmood Tajbakhsh
- Faculty of Chemistry, University of Mazandaran, Babolsar 47416-13534, Iran
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3
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Vanga SKR, Bollikolla HB, Peruri VVS. Catalyst‐free facile and efficient one‐pot synthesis of densely functionalized pyrroles and α‐amino ketones. J Heterocycl Chem 2021. [DOI: 10.1002/jhet.4227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Boddapati SNM, Tamminana R, Alam MM, Gugulothu S, Varala R, Bollikolla HB. Efficient Pd( ii)-catalyzed regioselective ortho-halogenation of arylcyanamides. NEW J CHEM 2021. [DOI: 10.1039/d1nj01998h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
2-Halo arylcyanamides have been constructed from cyanamides via Pd(ii)-catalyzed selective ortho-halogenation under moderate reaction conditions.
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Affiliation(s)
- S. N. Murthy Boddapati
- Department of Chemistry, Acharya Nagarjuna University, N Nagar, Guntur, A. P-522510, India
- Department of Chemistry, Sir C R Reddy College, P G Courses, Eluru, A.P-534007, India
| | - Ramana Tamminana
- Department of Chemistry, GITAM Deemed to be University, Bengaluru Campus, Bengaluru Rural, Karnataka, 562163, India
| | - M. Mujahid Alam
- Department of Chemistry, College of Science, King Khalid University, PO Box 9004, Abha 61413, Saudi Arabia
| | - Sailaja Gugulothu
- Department of Chemistry, Acharya Nagarjuna University, N Nagar, Guntur, A. P-522510, India
| | | | - Hari Babu Bollikolla
- Department of Chemistry, Acharya Nagarjuna University, N Nagar, Guntur, A. P-522510, India
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Jafari F, Ghorbani‐Choghamarani A, Hasanzadeh N. Guanidine complex of copper supported on boehmite nanoparticles as practical, recyclable, chemo and homoselective organic–inorganic hybrid nanocatalyst for organic reactions. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5901] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Fariba Jafari
- Department of Chemistry, Khozestan Science and Research Branch Islamic Azad University Ahvaz Iran
- Department of Chemistry, Ahvaz Branch Islamic Azad University Ahvaz Iran
| | - Arash Ghorbani‐Choghamarani
- Department of Chemistry, Ahvaz Branch Islamic Azad University Ahvaz Iran
- Department of Chemistry, Faculty of Science Ilam University P.O. Box 69315516 Ilam Iran
| | - Neda Hasanzadeh
- Department of Chemistry, Ahvaz Branch Islamic Azad University Ahvaz Iran
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Boddapati SNM, Tamminana R, Gollapudi RK, Nurbasha S, Assal ME, Alduhaish O, Siddiqui MRH, Bollikolla HB, Adil SF. Copper-Promoted One-Pot Approach: Synthesis of Benzimidazoles. Molecules 2020; 25:molecules25081788. [PMID: 32295143 PMCID: PMC7221555 DOI: 10.3390/molecules25081788] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 04/06/2020] [Accepted: 04/09/2020] [Indexed: 01/31/2023] Open
Abstract
A facile, one-pot, and proficient method was developed for the production of various 2-arylaminobenzimidazoles. This methodology is based for the first time on a copper catalyst promoted domino C-N cross-coupling reaction for the generation of 2-arylaminobenzimidazoles. Mechanistic investigations revealed that the synthetic pathway involves a copper-based desulphurization/nucleophilic substitution and a subsequent domino intra and intermolecular C-N cross-coupling reactions. Some of the issues typically encountered during the synthesis of 2-arylaminobezimidazoles, including the use of expensive catalytic systems and the low reactivity of bromo precursors, were addressed using this newly developed copper-catalyzed method. The reaction procedure is simple, generally with excellent substrate tolerance, and provides good to high yields of the desired products.
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Affiliation(s)
- S. N. Murthy Boddapati
- Department of Chemistry, Acharya Nagarjuna University, Guntur, Andhar Pradesh 522510, India; (S.N.M.B.); (R.K.G.); (S.N.)
- Department of Chemistry, Sir C. R. Reddy College, PG Courses, Eluru, Andhra Pradesh 534002, India
| | - Ramana Tamminana
- Department of Chemistry, GITAM Deemed to Be University, Bengaluru Campus, Karnataka 562163, India;
| | - Ravi Kumar Gollapudi
- Department of Chemistry, Acharya Nagarjuna University, Guntur, Andhar Pradesh 522510, India; (S.N.M.B.); (R.K.G.); (S.N.)
| | - Sharmila Nurbasha
- Department of Chemistry, Acharya Nagarjuna University, Guntur, Andhar Pradesh 522510, India; (S.N.M.B.); (R.K.G.); (S.N.)
| | - Mohamed E. Assal
- Department of Chemistry, College of Science, King Saud University, P.O. 2455, Riyadh 11451, Saudi Arabia; (M.E.A.); (M.R.H.S.)
| | - Osamah Alduhaish
- Department of Chemistry, College of Science, King Saud University, P.O. 2455, Riyadh 11451, Saudi Arabia; (M.E.A.); (M.R.H.S.)
- Correspondence: (O.A.); (H.B.B.); (S.F.A.)
| | - Mohammed Rafiq H. Siddiqui
- Department of Chemistry, College of Science, King Saud University, P.O. 2455, Riyadh 11451, Saudi Arabia; (M.E.A.); (M.R.H.S.)
| | - Hari Babu Bollikolla
- Department of Chemistry, Acharya Nagarjuna University, Guntur, Andhar Pradesh 522510, India; (S.N.M.B.); (R.K.G.); (S.N.)
- Correspondence: (O.A.); (H.B.B.); (S.F.A.)
| | - Syed Farooq Adil
- Department of Chemistry, College of Science, King Saud University, P.O. 2455, Riyadh 11451, Saudi Arabia; (M.E.A.); (M.R.H.S.)
- Correspondence: (O.A.); (H.B.B.); (S.F.A.)
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