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Your search keyword '"Gopal Krushna Das"' showing total 3 results
Start Over Author "Gopal Krushna Das" Topic regioselectivity
3 results on '"Gopal Krushna Das"'

1. Breaking the Trend: Insight into Unforeseen Reactivity of Alkynes in Cobalt-Catalyzed Weak Chelation-Assisted Regioselective C(4)–H Functionalization of 3-Pivaloyl Indole

Author

Bedadyuti Vedvyas Pati, Juhi Dutta, Gopal Krushna Das Adhikari, Shyam Kumar Banjare, Tanmayee Nanda, and Ponneri Chandrababu Ravikumar

Subjects
Indole test, Chemistry, Surface modification, Regioselectivity, chemistry.chemical_element, Chelation, Reactivity (chemistry), General Chemistry, Medicinal chemistry, Cobalt, Catalysis
Published
2021
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2. Ruthenium-Catalyzed Regioselective C(sp2)–H Activation/Annulation of N-(7-Azaindole)amides with 1,3-Diynes Using N-Amino-7-azaindole as the N,N-Bidentate Directing Group

Author

Bedadyuti Vedvyas Pati, Prateep Singh Sagara, Ponneri Chandrababu Ravikumar, Asit Ghosh, and Gopal Krushna Das Adhikari

Subjects
Annulation, Denticity, 010405 organic chemistry, Stereochemistry, Chemistry, Aryl, Organic Chemistry, Regioselectivity, chemistry.chemical_element, 010402 general chemistry, 01 natural sciences, 0104 chemical sciences, Catalysis, Ruthenium, chemistry.chemical_compound, Group (periodic table)
Abstract

The ruthenium(II)-catalyzed regioselective annulation of N-(7-azaindole)amides with 1,3-diynes has been demonstrated. Bioactive N-amino-7-azaindole has been used as a new bidentate directing group to furnish an array of 3-alkynylated isoquinolones. Furthermore, the developed protocol works efficiently for both aryl- and heteroaryl-substituted amides producing a range of pharmacologically useful 7-azaindole-based isoquinolones with a wide range of functionality.

Published
2021
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3. Regio- and Stereoselective Synthesis of the Core Structure of Hexahydrobenzo[c]phenanthridine Alkaloids via Redox-Neutral Cp*Rh(III)-Catalyzed C−H/N−H Annulation of Cyclic Alkenes with Benzamides

Author

Ponneri Chandrababu Ravikumar, Gopal Krushna Das Adhikari, and Rajesh Chebolu

Subjects
Annulation, Phenanthridine, Chemistry, Stereochemistry, General Chemical Engineering, Substrate (chemistry), Regioselectivity, General Chemistry, Redox, Article, Catalysis, Cyclic Alkenes, chemistry.chemical_compound, Stereoselectivity, QD1-999
Abstract

A highly stereo- and regioselective synthesis of the core skeleton of hexahydrobenzo[c]phenanthridine-type alkaloids is reported herein for the first time. A wide range of substrate scope, excellent functional group tolerance, and good to excellent yields were observed. This protocol gives very concise and efficient access to the core skeleton of chelidonine alkaloids as compared to the earlier approaches.

Published
2021
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