Author
P. Manivel
Other affiliations: Biocon
Bio: P. Manivel is an academic researcher from VIT University. The author has contributed to research in topics: Ring (chemistry) & Isoquinoline. The author has an hindex of 12, co-authored 65 publications receiving 453 citations. Previous affiliations of P. Manivel include Biocon.
Topics: Ring (chemistry), Isoquinoline, Dihedral angle, Pyrazole, Aryl
Papers
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TL;DR: In this paper, a facile and microwave accelerated reaction of 1-chloro-3-(4-chlorophenyl)isoquinoline with various heterocyclic amines, catalyzed by Pd, in the presence of BINAP additive and sodium carbonate as the base, leads to the formation of 3-(4chloro)-1-(1H-1,2,3-triazol-1-yl) isoquinoline via Buchwald protocol in good yields.
46 citations
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TL;DR: Nawaz et al. as mentioned in this paper presented a method to synthesize o-substituted benzophenones (2) from 3-substantitued isocoumarins (1) and phenyl magnesium bromide in presence of anhydrous ether under dry ice-solvent bath.
Abstract: A series of o-substituted benzophenones was prepared by efficient method involving the 3-substituted isocoumarins and phenylmagnesium bromide. The reaction was completed in presence of anhydrous ether under dry ice-solvent bath in few hours with modest to good yields.Key words: Isocoumarins, diketones, aryl, phenyl magnesium bromide, ether, dry ice.e-mail: nawaz_f@yahoo.co.in. INTRODUCTION Synthetic and naturally occurring isocoumarins possess important biological properties. They are useful intermediates in the synthesis of a variety of carbocyclic and heterocyclic compounds 1-6 .In continuous of our interest in carbon-carbon bond formation reaction 7-12 ,the present paper presents an efficient method to synthesize o-substituted benzophenones (2) from 3-substitued isocoumarins (1) and phenyl magnesium bromide in presence of anhydrous ether under dry ice-solvent bath. Benzophenone and its derivatives are important intermediates in dyes, pharmaceutical and other chemical industries
31 citations
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TL;DR: In this paper, new hydrazine derivatives were synthesized via reaction between 1, 3 cyclic diketones and hydrazinoisoquinoline derivatives in ethanol under reflux temperature and furnished products in excellent yields (76-87%).
Abstract: New hydrazine derivatives were synthesized via reaction between 1, 3 cyclic diketones and hydrazinoisoquinoline derivatives. The reaction proceeded smoothly in ethanol under reflux temperature and furnished products in excellent yields (76–87%). The products have been purified and fully characterized by spectroscopy techniques. The compounds 8a-c showed good bacterial inhibition against Bacillus cerus and 8d-f showed good antifungal activity against Candida albicans.
28 citations
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TL;DR: In this paper, an efficient and simple thiourea-mediated regioselective synthesis of symmetrical and unsymmetrical diversified thioethers was reported, which avoids byproduct formation and offers simplified methodology, wider applicability, and easy workability.
Abstract: An efficient and simple thiourea-mediated regioselective synthesis of symmetrical and unsymmetrical diversified thioethers is reported. The regioselective reaction avoids byproduct formation and offers simplified methodology, wider applicability, and easy workability and an environmentally friendly approach toward symmetrical and unsymmetrical thioethers. The mechanism of formation of thiols and symmetrical and unsymmetrical thioethers involving a sulfur surrogate is described.
26 citations
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TL;DR: In this article, the importance of such interactions in crystal structure packing along with routine C-H⋯π and π-π interactions was examined in the context of overall stability in the molecular assembly.
Abstract: Five derivatives of thioisocoumarin bearing aromatic and nonaromatic ring systems have been synthesized and characterized to unravel the importance of interactions due to the presence of a sulfur atom in generating packing motifs in the crystalline state. Apart from the well characterized interactions like C–H⋯S, a CS⋯π interaction is found in one of the case studies. The importance of such interactions in crystal structure packing along with routine C–H⋯π and π⋯π interactions is examined in the context of overall stability in the molecular assembly. The CS⋯π interactions in comparison to CO⋯π interactions have been analyzed using the Cambridge Structural Database (CSD).
23 citations
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TL;DR: This review concludes that Etherification without Cyclization and N-Alkylation should be considered as separate science, and the proposed treatment of Etherification with Cyclization as a separate science should be reconsidered.
Abstract: 10. Patented Literature 2616 10.1. Esterification 2616 10.2. Ether Formation 2619 10.2.1. Etherification without Cyclization 2619 10.2.2. Etherification with Cyclization 2624 10.3. N-Alkylation 2625 10.4. Other Reactions 2627 11. Summary and Outlook 2628 12. Note Added in Proof 2628 13. Abbreviations Used in This Review 2629 14. Acknowledgments 2629 15. Supporting Information Available 2630 16. References 2630
909 citations
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TL;DR: In this article, a discussion of cross-coupling chemistry of these two metals can be performed within a common mechanistic paradigm, helping to elucidate the key factors governing the behavior of the transition-metal complexes involved.
355 citations
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TL;DR: The colloidal solution of silver nanoparticles were found to exhibit antibacterial activity against Escherichia coli, Pseudomonas aeruginosa, Klebsiella pneumonia and, Enterococcus faecalis.
254 citations
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01 Jan 1960
TL;DR: This comprehensive review combines descriptive synthetic chemistry and mechanistic insight to enhance understanding of how chemistry drives the preparation and useful properties of heterocyclic compounds.
Abstract: Cover -- Advancesin Heterocyclic Chemistry13; -- Copyright Page -- Contents -- Contributors -- Preface13; -- Chapter 113; Hexameric Macrocyclic Architectures in Heterocyclic Chemistry -- 1. Introduction -- 2. Macrocycles with Five-Membered Heterocyclic Subunits -- 3. Six-Membered Ring Heterocycles -- 4. Miscellaneous Heterocyclic Materials -- 5. Conclusions -- References -- Chapter 2 13;Metal-Catalyzed Intramolecular Heteroatom (X)!Carbon(C) Functional Group Migration Reactions Involving Additionsof X2;Y Bonds Across Alkynes -- 1. Introduction -- 2. Synthesis of O-Containing Heterocycles -- 3. Synthesis of N-Containing Heterocycles -- 4. Synthesis of S-Containing Heterocycles -- 5. Synthesis of Se-Containing Heterocycles -- 6. Conclusions -- Acknowledgments -- References -- Chapter 313; Biindolyls -- 1. Introduction -- 2. Synthesis -- 3. Reactions -- 4. Conclusion -- References -- Chapter 413; The Annulation of 2-Imidazolines -- 1. Introduction -- 2. Polar Annulation Strategy -- 3. Imidazolines as Double Nucleophiles -- 4. Annulations of the Enamino Ester/Ketene Aminal -- 5. Annulations of N-Unsubstituted 2-Imidazolines -- 6. Imidazolines as Sources of 1,3-Dipoles -- 7. Azomethine Ylides by Alkylation2;Deprotonation -- 8. Azomethine Ylides by Carbene Insertion in a Catalytic Cycle -- 9. Azomethine Ylides by Conjugate Addition-Proton Transfer -- 10. Annulations Using Chiral Imidazolines -- 11. Optically Active Piperidines via Enamino Ester Annulation -- 12. Dipolar Cycloaddition of Optically Active Imidazolinium Ylides -- 13. Chiral Imidazoline Nitrones in Cycloadditions -- 14. Summary -- References -- Chapter 5 Recent Advances in the Dimroth Rearrangement: A ValuableTool for the Synthesis of Heterocycles -- 1. Introduction -- 2. Translocation of Heteroatoms in Fused Heterocycles (Type 1) -- 3. Translocation of Exo- and Endocyclic Heteroatoms in Heterocycles(Type 2) -- Acknowledgments -- References -- Subject Index.
208 citations