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Silica-Immobilized Highly Dispersed Oxo–Rhenium and its Catalytic Activity for the Direct Synthesis of Nitrones

Authors

  • Bhawan Singh,

    1. Catalytic Conversion Process Division, Indian Institute of Petroleum (Council of Scientific & Industrial Research), Mohkampur, Dehradun-248005 (India), Fax: (+91) 135-266-0202
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  • Dr. Suman L. Jain,

    1. Chemical Sciences Division, Indian Institute of Petroleum (Council of Scientific & Industrial Research), Mohkampur, Dehradun-248005 (India), Fax: (+91) 135-266-0202
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  • Bharat S. Rana,

    1. Catalytic Conversion Process Division, Indian Institute of Petroleum (Council of Scientific & Industrial Research), Mohkampur, Dehradun-248005 (India), Fax: (+91) 135-266-0202
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  • Praveen K. Khatri,

    1. Chemical Sciences Division, Indian Institute of Petroleum (Council of Scientific & Industrial Research), Mohkampur, Dehradun-248005 (India), Fax: (+91) 135-266-0202
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  • Dr. Anil K. Sinha,

    1. Catalytic Conversion Process Division, Indian Institute of Petroleum (Council of Scientific & Industrial Research), Mohkampur, Dehradun-248005 (India), Fax: (+91) 135-266-0202
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  • Dr. Bir Sain

    1. Chemical Sciences Division, Indian Institute of Petroleum (Council of Scientific & Industrial Research), Mohkampur, Dehradun-248005 (India), Fax: (+91) 135-266-0202
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Abstract

A novel covalently attached silica-immobilized oxo–rhenium catalyst was prepared by the reaction of perrhenic acid and 3-chloropropyl functionalized mesoporous SBA-15, in which the oxo–rhenium species is chemically bonded to the support, preventing leaching. The prepared silica-immobilized oxo–rhenium was found to be an efficient and recyclable catalyst for the one-pot condensation/oxidation of aldehydes and primary amines to nitrones in high yields using urea–hydrogen peroxide as a terminal oxidant under mild reaction conditions.

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