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Phosphorus, Sulfur, and Silicon and the Related Elements Volume 190, 2015 - Issue 9
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Original Articles

Silica-Supported Tungstic Acid Catalyzed Synthesis and Antioxidant Activity of α-Hydroxyphosphonates

S. SanthisudhaDepartment of Chemistry, Sri Venkateswara University, Tirupati, Andhra Pradesh517 502, India
,
P. SreelakshmiDepartment of Chemistry, Sri Venkateswara University, Tirupati, Andhra Pradesh517 502, India
,
S. H. JayaprakashDepartment of Chemistry, Sri Venkateswara University, Tirupati, Andhra Pradesh517 502, India
,
B. Vijaya KumarDepartment of Biotechnology, Sri Venkateswara University, Tirupati, 517 502, Andhra Pradesh, India
&
C. Suresh ReddyDepartment of Chemistry, Sri Venkateswara University, Tirupati, Andhra Pradesh517 502, IndiaCorrespondence[email protected]
Pages 1479-1488 | Received 23 Aug 2014, Accepted 21 Nov 2014, Published online: 17 Aug 2015
 
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GRAPHICAL ABSTRACT

Abstract

A green and efficient method has been accomplished for the synthesis of α-hydroxyphosphonates using silica-supported tungstic acid (STA) as a heterogeneous catalyst under solvent-free conditions at ambient temperature. The compounds obtained were characterized by spectral and analytical studies and screened in vitro for the antioxidant activity by four methods viz., DPPH free radical scavenging assay, hydrogen peroxide scavenging assay, NO method, FRAP method. The results indicated that the title compounds are potential antioxidants and are comparable to the antioxidant property of the standard ascorbic acid.

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Related Research Data

Bi(NO3)3.5H2O catalyzed phosphonylation of aldehydes: An efficient route to α-hydroxyphosphonates
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Silica Supported Tungsticacid (STA) Catalysed Synthesis and Antioxidant Activity of α-Hydroxyphosphonates
Source: Taylor & Francis
CeCl3⋅7H2O-catalysed hydrophosphonylation of aldehydes and ketones: An expeditious route to α-hydroxyphosphonates under solvent-free conditions
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CeCl3⋅7H2O-catalysed hydrophosphonylation of aldehydes and ketones: An expeditious route to α-hydroxyphosphonates under solvent-free conditions
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