NDLI: Modified Silico-Tungstate: An Easy and Efficient Catalyst for the Acetylation of Amines Under Solvent-Free Condition

Content Provider	Springer Nature Link
Author	Sharma, R. K. Rawat, Deepti
Copyright Year	2010
Abstract	In this present work, organo-functionalization of silica gel was carried out using 3-aminopropyltriethoxysilane (APTES) as a reactive surface modifier. Tungstate ion (WO$_{4}$ $^{2−}$) was immobilized onto the modified silica gel and its catalytic activity was investigated for acetylation of amines under solvent-free conditions. The method is highly chemoselective—amine group was selectively acetylated in presence of the hydroxyl group. The above catalyst gave acetylated products in excellent yield in shorter duration of time. The catalyst was characterized by various techniques such as BET surface area measurements, FTIR, CHNS, $^{13}$C-CPMAS-NMR, ED-XRF and diffuse reflectance UV–vis techniques. The catalyst was reused five times without significant loss of catalytic activity.In this present work, organo-functionalization of silica gel was carried out using 3-aminopropyltriethoxysilane (APTES) as a reactive surface modifier. Tungstate ion (WO$_{4}$ $^{2−}$) was immobilized onto the modified silica gel and its catalytic activity was investigated for acetylation of amines under solvent-free conditions. The method is highly chemoselective—amine group was selectively acetylated in presence of the hydroxyl group. The above catalyst gave acetylated products in excellent yield in shorter duration of time. The catalyst was characterized by various techniques such as BET surface area measurements, FTIR, CHNS, $^{13}$C-CPMAS-NMR, ED-XRF and diffuse reflectance UV–vis techniques. The catalyst was reused five times without significant loss of catalytic activity.
Starting Page	698
Ending Page	705
Page Count	8
File Format	PDF
ISSN	15741443
Journal	Journal of Inorganic and Organometallic Polymers and Materials
Volume Number	20
Issue Number	4
e-ISSN	15741451
Language	English
Publisher	Springer US
Publisher Date	2010-06-23
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Acetylation Amines Modified silica Tungstate Solvent-free Polymer Sciences Organic Chemistry Inorganic Chemistry
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Polymers and Plastics

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