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4 results on '"Polasani Samatha"'

1. Substitution controlled aryne insertion: synthesis of diarylmethane/chromones

Author

Jadhav Rahul Dhanaji, Polasani Samatha, Silver Raju, Prathama S. Mainkar, Raju Adepu, and Srivari Chandrasekhar

Subjects
Materials Chemistry, Metals and Alloys, Ceramics and Composites, General Chemistry, Catalysis, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials
Abstract

A cascade double aryne insertion reaction was developed to generate a library of diarylmethane scaffolds. Additionally, chromone products were observed in presence of an electronegative atom at the ortho position of aryne.

Published
2023

2. Poly(ethylene glycol) Dimethyl Ethers (PEGDME): Efficient and Recyclable Solvents for Aryne-Involved Reactions

Author

Srivari Chandrasekhar, Shweta Rai, Polasani Samatha, Ramunaidu Addipilli, Prathama S. Mainkar, Prabhakar Sripadi, and Raju Adepu

Subjects
Organic Chemistry, Catalysis
Abstract

A variety of aryne reactions are demonstrated in poly(ethylene glycol) dimethyl ethers (PEGDMEs) as solvents without the need of any additive. The reactions proceed efficiently and good yields of the desired products are observed with PEGDME. Further, the advantage of being able to recycle PEG solvents is demonstrated in this work.

Published
2022

3. Rhodium catalysed intramolecular benzannulation for the formation of tetracyclic carbazoles

Author

Y Bharath Chaithanya Kumar, Polasani Samatha, Prathama S. Mainkar, and Raju Adepu

Subjects
Alkynes, Organic Chemistry, Carbazoles, Rhodium, Physical and Theoretical Chemistry, Biochemistry, Catalysis
Abstract

Rhodium catalyzed alkyne-tethered intramolecular annulation has been demonstrated for the synthesis of tetracyclic carbazole skeletons and a series of five to eight-membered pyrido[3,2,1

Published
2022

4. Synthesis of 2-Amino-2′-hydroxy-1,1′-biaryls via Cascade Benzannulation and C–N Bond Cleavage Sequence

Author

Polasani Samatha, Prathama S. Mainkar, Jadhav Rahul Dhanaji, Raju Adepu, and Srivari Chandrasekhar

Subjects
Annulation, 010405 organic chemistry, Chemistry, Stereochemistry, Organic Chemistry, Sequence (biology), 010402 general chemistry, 01 natural sciences, Biochemistry, Aryne, 0104 chemical sciences, Cascade, Intramolecular force, Michael reaction, Structural isomer, Physical and Theoretical Chemistry, Bond cleavage
Abstract

A serendipitous synthesis of N-substituted 2-amino-2'-hydroxy-1,1'-biaryls through an aryne annulation with indolyl β-ketonitrile/ester in a cascade manner is demonstrated. The reaction sequence involves benzyne-mediated [2 + 2] Stoltz-type cycloaddition-cleavage and intramolecular Michael addition followed by C-N bond cleavage under transition-metal-free reaction conditions. Interestingly, while [4 + 2] Diels-Alder reaction is a possible pathway, no traces of the regioisomer was isolated.

Published
2020

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