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Your search keyword '"Reddy, M. Veera Narayana"' showing total 20 results
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20 results on '"Reddy, M. Veera Narayana"'

17. Green Synthesis of Aminobisphosphonates Under Microwave Irradiation.

Author

Reddy, G. Chandra Sekhar, Reddy, M. Veera Narayana, Reddy, N. Bakthavatchala, and Reddy, C. Suresh

Subjects
*PHOSPHONATES, *MICROWAVES, *IRRADIATION, *CHEMICAL reactions, *ALIPHATIC compounds, *AROMATIC amines, *ALUMINUM oxide, ENVIRONMENTAL aspects
Abstract

A simple, efficient, and environmentally benign green chemical method has been developed for the synthesis of aminobisphosphonates by reacting aliphatic/aromatic 2°-amines, dimethylphosphite, and triethylorthoformate by microwave irradiation under solvent-free conditions, in the presence of an alumina solid support. The advantages of this method are less reaction time, simple work-up, and excellent yields. Supplemental materials are available for this article. Go to the publisher's online edition of Phosphorus, Sulfur, and Silicon and the Related Elements to view the free supplemental file. GRAPHICAL ABSTRACT[image omitted] [ABSTRACT FROM AUTHOR]

Published
2011
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18. Tetramethyl guanidine (TMG) catalyzed synthesis of novel α-amino phosphonates by one-pot reaction.

Author

Reddy, M. Veera Narayana, Annar, S., Krishna, A. Bala, Reddy, G. Chandra Sekhar, and Reddy, C. Suresh

Subjects
*PHOSPHONATES, *ANTIBIOTICS assay, *FURANS, *CYCLOBUTANE, *GUANIDINES, *BIOSYNTHESIS
Abstract

An efficient method has been developed for the synthesis of a-amino phosphonates (4a-j) by the three component one-pot reaction of equimolar quantities of 2-amino methyl furan (1), dimethyl / diethyl phosphite (2) and various aldehydes (3a-j) in dry toluene at reflux conditions via Kabachnik - Fields reaction in high yields (70-80%) in the presence of tetramethyl guanidine (TMG) as catalyst. The TMG can be easily recovered from the reaction mixture after completion of the reaction and can be reused. Their antimicrobial activity has also been evaluated. [ABSTRACT FROM AUTHOR]

Published
2010

19. ChemInform Abstract: Synthesis and Antiosteoclast Activity of Di(1-oxo/thioxoperhydro-1λ5-[1,3,2]diazaphospholo [1,5-a]pyridine-1-yl)(4-substituted phenyl) Boronates.

Author

Reddy, G. Chandra Sekhar, Reddy, M. Veera Narayana, Rani, C. Radha, Reddy, N. Bakthavatchala, Rao, K. Uma Maheswara, Nayak, S. K., and Reddy, C. Suresh

Abstract

All boronates (III) (10 examples), especially derivative (IIIc), show moderate to high antiosteoclast and osteoblast activities. [ABSTRACT FROM AUTHOR]

Published
2012
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20. Green chemical synthesis of α-hydroxyphosphonates.

Author

Kumar, K. Suresh, Reddy, C. Bhupendra, Reddy, M. Veera Narayana, Rani, C. Radha, and Reddy, C. Suresh

Subjects
*SUSTAINABLE chemistry, *PHOSPHONATES, *ORGANIC synthesis, *ALDEHYDES, *TEMPERATURE effect, *SOLVENTS, *PIPERAZINE, *CATALYSTS
Abstract

A green and efficient method for the preparation of α-hydroxyphosphonates (3a-n) in minutes of time with high yields is accomplished by grinding the mixture of various aldehydes (1a-n) and diethylphosphite (2) at room temperature under solvent free conditions in presence of piperazine as catalyst. [ABSTRACT FROM AUTHOR]

Published
2012

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