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

被引：17

作者：

Sharma, R. K. ^{[1
]}

Rawat, Deepti ^{[1
]}

机构：

[1] Univ Delhi, Dept Chem, Green Chem Network Ctr, Delhi 110007, India

来源：

JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS | 2010年 / 20卷 / 04期

关键词：

Acetylation; Amines; Modified silica; Tungstate; Solvent-free; HIGHLY EFFICIENT; ACETIC-ANHYDRIDE; HETEROGENEOUS CATALYST; SELECTIVE ACETYLATION; GADOLINIUM TRIFLATE; METAL-IONS; ALCOHOLS; ACYLATION; PHENOLS; ACID;

D O I：

10.1007/s10904-010-9385-2

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

In this present work, organo-functionalization of silica gel was carried out using 3-aminopropyltriethoxysilane (APTES) as a reactive surface modifier. Tungstate ion (WO4 (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, C-13-CPMAS-NMR, ED-XRF and diffuse reflectance UV-vis techniques. The catalyst was reused five times without significant loss of catalytic activity.

引用

页码：698 / 705

页数：8

共 42 条

[1] Gadolinium triflate: an efficient and convenient catalyst for acetylation of alcohols and amines [J].

Alleti, R ;

Perambuduru, M ;

Samantha, S ;

Reddy, VP .

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2005, 226 (01) :57-59

[2]

Backer R.H., 1955, ORG SYNTH, V3, P141

[3] Scandium(III) or lanthanide(III) triflates as recyclable catalysts for the direct acetylation of alcohols with acetic acid [J].

Barrett, AGM ;

Braddock, DC .

CHEMICAL COMMUNICATIONS, 1997, (04) :351-352

[4] Indium(III) chloride as a new, highly efficient, and versatile catalyst for acylation of phenols, thiols, alcohols, and amines [J].

Chakraborti, AK ;

Gulhane, R .

TETRAHEDRON LETTERS, 2003, 44 (35) :6749-6753

[5] Lewis acid catalyzed acylation reactions: scope and limitations [J].

Chandra, KL ;

Saravanan, P ;

Singh, RK ;

Singh, VK .

TETRAHEDRON, 2002, 58 (07) :1369-1374

[6] Acylation of alcohols with acetic anhydride catalyzed by TaCl5:: Some implications in kinetic resolution [J].

Chandrasekhar, S ;

Ramachander, T ;

Takhi, M .

TETRAHEDRON LETTERS, 1998, 39 (20) :3263-3266

[7] Highly efficient and versatile acetylation of alcohols catalyzed by cerium(III) triflate [J].

Dalpozzo, R ;

De Nino, A ;

Maiuolo, L ;

Procopio, A ;

Nardi, M ;

Bartoli, G ;

Romeo, R .

TETRAHEDRON LETTERS, 2003, 44 (30) :5621-5624

[8] A highly selective and efficient acetylation of alcohols and amines with acetic anhydride using NaHSO4•SiO2 as a heterogeneous catalyst [J].

Das, Biswanath ;

Thirupathi, Ponnaboina .

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2007, 269 (1-2) :12-16

[9] Ruthenium(III) chloride catalyzed acylation of alcohols, phenols, thiols, and amines [J].

De, SK .

TETRAHEDRON LETTERS, 2004, 45 (14) :2919-2922

[10] Bismuth ferrite (BiFeO3) nanopowder prepared by sucrose-assisted combustion method: A novel and reusable heterogeneous catalyst for acetylation of amines, alcohols and phenols under solvent-free conditions [J].

Farhadi, Saeid ;

Zaidi, Masoumeh .

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL, 2009, 299 (1-2) :18-25

← 1 2 3 4 5 →