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Your search keyword '"Jagadeesh Bharatam"' showing total 3 results
Start Over Author "Jagadeesh Bharatam" Topic cyclization
3 results on '"Jagadeesh Bharatam"'

1. Highly enantioselective carbon-carbon bond formation by Cu-catalyzed asymmetric [2,3]-sigmatropic rearrangement: application to the syntheses of seven-membered oxacycles and six-membered carbocycles

Author

Gullapalli Kumaraswamy, Kadivendi Sadaiah, Duggirala Subrahmanya Ramakrishna, Naresh Police, Balasubramanian Sridhar, and Jagadeesh Bharatam

Subjects
Models, Molecular, Stereochemistry, 2,3-sigmatropic rearrangement, Molecular Conformation, Alkenes, Crystallography, X-Ray, Heterocyclic Compounds, 2-Ring, Catalysis, Materials Chemistry, Organometallic Compounds, chemistry.chemical_classification, Chemistry, Metals and Alloys, Enantioselective synthesis, Stereoisomerism, General Chemistry, Carbon, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Carbon–carbon bond, Ylide, Cyclization, Alcohols, Oxepins, Ceramics and Composites, Copper
Abstract

A concise route for the syntheses of enantioenriched functionalized scaffolds of medium-sized oxacycles and carbocycles employing the chiral auxiliary-mediated Cu-catalyzed ylide formation/[2,3]-sigmatropic rearrangement as a key step was developed.

Published
2008

2. Tandem Prins Strategy for the Synthesis of Spiropyrrolidine and Spiropiperidine Derivatives.

Author

Reddy, Basi V. Subba, Yarlagadda, Suresh, Reddy, C. Ravikumar, Reddy, M. Rajashekhar, Sridhar, Balasubramanyan, Satyanarayana, Dayaka, and Jagadeesh, Bharatam

Subjects
RING formation (Chemistry), PYRROLIDINE derivatives, PIPERIDINE derivatives, SPIRO compounds, TRIMETHYLSILYL compounds, ALDEHYDES
Abstract

Cascade cyclization of a 3-[(3-methylbut-2-enylamino)methyl]but-3-en-1-ol derivative with aldehydes in the presence of TMSOTf at 0 °C under mild conditions provides the corresponding spiropyrrolidine scaffolds in good yields. Similar cyclization of a 3-[(4-methylpent-3-enylamino)methyl]but-3-en-1-ol derivative with aldehydes affords the correponding spiropiperidine compounds. This is a new approach for the construction of biologically relevant spirocycles in a single-step process. [ABSTRACT FROM AUTHOR]

Published
2015
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3. Iron(III)-Catalyzed C-H Functionalization: ortho-Benzoyloxylation of N, N-Dialkylanilines and Its Application to 1,4-Benzoxazepines.

Author

Chiranjeevi, Barreddi, Vinayak, Botla, Parsharamulu, Thupakula, PhaniBabu, Vemulapalli S., Jagadeesh, Bharatam, Sridhar, Balasubramanian, and Chandrasekharam, Malapaka

Subjects
IRON, CATALYSIS, CARBON, HYDROGEN, BENZOYL compounds
Abstract

A C-O bond-formation reaction that proceeds through C-H functionalization of N, N-dialkylanilines at the ortho-position is presented. The iron-catalyzed selective ortho-benzoyloxylation follows a polar Friedel-Crafts-like mechanism and is sensitive to the nucleophilicity of the anilines. The benzoyloxylation of a variety of N, N-disubstituted anilines and N-phenyl heterocycles is carried out under extremely mild conditions. Furthermore, the methodology has been successfully employed for the generation of 1,4-benzoxazepines and o-aminophenols. [ABSTRACT FROM AUTHOR]

Published
2014
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