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5 results on '"Haribabu Chennamsetti"'

2. Rhodium Enalcarbenoids: Direct Synthesis of Indoles by Rhodium(II)-Catalyzed [4+2] Benzannulation of Pyrroles

Author

Jagadeesh Kalepu, Bapurao Sudam Lad, Vinaykumar Kanchupalli, Sreenivas Katukojvala, Sudam Ganpat Dawande, and Haribabu Chennamsetti

Subjects
Annulation, Indoles, Natural product, Molecular Structure, chemistry.chemical_element, Stereoisomerism, General Chemistry, General Medicine, Decomposition, Catalysis, Rhodium, chemistry.chemical_compound, chemistry, Electrophile, Organic chemistry, Pyrroles, Carbene
Abstract

Disclosed herein is the design of an unprecedented electrophilic rhodium enalcarbenoid which results from rhodium(II)-catalyzed decomposition of a new class of enaldiazo compounds. The synthetic utility of these enalcarbenoids has been successfully demonstrated in the first transition-metal-catalyzed [4+2] benzannulation of pyrroles, thus leading to substituted indoles. The new benzannulation has been applied to the efficient synthesis of the natural product leiocarpone as well as a potent adipocyte fatty-acid binding protein inhibitor.

Published
2014

3. ChemInform Abstract: An Unprecedented Benzannulation of Oxindoles with Enalcarbenoids: A Regioselective Approach to Functionalized Carbazoles

Author

Haribabu Chennamsetti, Bapurao Sudam Lad, Sreenivas Katukojvala, and Kuldeep S. Rathore

Subjects
Tandem, Chemistry, Acid catalyzed, Regioselectivity, General Medicine, Combinatorial chemistry
Abstract

The novel Rh(II)/Broensted acid catalyzed tandem benzannulation of oxindoles with enaldiazo carbonyls results in the formation of valuable 1-hydroxy-2-acylcarbazoles.

Published
2016

4. An unprecedented benzannulation of oxindoles with enalcarbenoids: a regioselective approach to functionalized carbazoles

Author

Kuldeep S. Rathore, Bapurao Sudam Lad, Sreenivas Katukojvala, and Haribabu Chennamsetti

Subjects
Tandem, 010405 organic chemistry, Chemistry, education, Metals and Alloys, Regioselectivity, chemistry.chemical_element, Nanotechnology, General Chemistry, 010402 general chemistry, 01 natural sciences, Combinatorial chemistry, Catalysis, 0104 chemical sciences, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Rhodium, chemistry.chemical_compound, Materials Chemistry, Ceramics and Composites, Oxindole, Brønsted–Lowry acid–base theory
Abstract

A novel Rh(ii)/Brønsted acid catalyzed tandem benzannulation of oxindoles with enaldiazo carbonyls led to the formation of valuable 1-hydroxy-2-acylcarbazoles. This reaction is proposed to involve a formal insertion of a rhodium enalcarbenoid into an oxindole sp(2) C-O bond, an oxa-Michael addition, Friedel-Crafts reaction and a semipinacol type 1,2-carbonyl migration.

Published
2016

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