63867-04-9Relevant articles and documents
A novel silver nanoparticle embedded mesoporous polyaniline (mPANI/Ag) nanocomposite as a recyclable catalyst in the acylation of amines and alcohols under solvent free conditions
Mandi, Usha,Roy, Anupam Singha,Banerjee, Biplab,Islam, Sk. Manirul
, p. 42670 - 42681 (2014)
A mesoporous polyaniline/silver (mPANI/Ag) nanocomposite has been prepared using mesoporous organic polymer polyaniline with silver nitrate via radical polymerization of aniline monomer in the presence of hydrochloric acid. The mPANI/Ag nanocomposite has been characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), energy-dispersive X-ray spectra (EDX), Fourier transform infrared spectroscopy (FT-IR), and ultraviolet-visible absorption spectra (UV-vis). The XRD patterns indicated that the crystalline phase of Ag is cubic. TEM images show that the Ag nanoparticles are well dispersed in the mesoporous polyaniline matrix. The mPANI/Ag acts as an efficient heterogeneous nanocatalyst in the acylation of substituted amines and alcohols using acetic acid. The catalyst is air-stable, inexpensive, easy to prepare and can be reused several times without a significant decrease in activity and selectivity. This journal is
Microwave-accelerated selective acylation of (hydroxyalkyl)phenols using acid chlorides
Miyazawa, Toshifumi,Yamamoto, Masato,Maeda, Yuki
experimental part, p. 1092 - 1099 (2009/09/06)
Highly selective acylation of the alcoholic hydroxy group can be achieved with (hydroxyalkyl)phenols carrying both alcoholic and phenolic hydroxyls by the use of the most common acylating agents, acid chlorides, under microwave irradiation. Copyright Tayl
A simple method for deprotection of tert-butyldimethylsilyl ethers by using stannous chloride under microwave irradiation
Jadhav, Vinod H.,Borate, Hanumant B.,Wakharkar, Radhika D.
, p. 322 - 324 (2007/10/03)
A facile regeneration of hydroxy compounds from their tert- butyldimethylsilyl ethers in presence of stannous chloride under solvent free conditions using domestic microwave oven has been performed efficiently in a short period (5-6 min). The conversion using stannous chloride in ethanol or water for comparison of the efficiency has been described. The generality of the transformation has been confirmed by several examples.
Enzyme-catalyzed chemoselective transesterification reactions on hydroxymethylated phenolic compounds
Parmar, Virinder S.,Prasad, Ashok K.,Pati, Hari N.,Kumar, Rajesh,Azim, Abul,Roy, Sucharita,Errington, William
, p. 119 - 134 (2007/10/03)
The chemoselective capabilities of porcine pancreatic lipase (PPL) in tetrahydrofuran and Candida rugosa lipase (CRL) in diisopropyl ether have been investigated for selective acetylation and deacetylation of hydroxymethylated phenols and hydroxyaryl alky
Lipase-catalysed chemoselective monoacetylation of hydroxyalkylphenols and chemoselective removal of a single acetyl group from their diacetates
Allevi, Pietro,Ciuffreda, Pierangela,Longo, Alessandra,Anastasia, Mario
, p. 2915 - 2924 (2007/10/03)
It was demonstrated that Pseudomonas cepacia PS lipase adsorbed on Celite, has the ability to catalyse the chemoselective monoacetylation of various hydroxyalkylphenols or the chemoselective removal of a single acetyl group from the corresponding acetate.
Twisted amides as selective acylating agents for hydroxyl groups under neutral conditions: Models for activated peptides during enzymatic acyl transfer reaction
Yamada, Shinji,Sugaki, Takayuki,Matsuzaki, Kazuhiro
, p. 5932 - 5938 (2007/10/03)
The highly twisted amide 2 served as a selective acylating agent for diols under neutral conditions. The reaction of primary-secondary diols with 2 led to the corresponding primary alkyl monopivalates. For diols containing alcoholic and phenolic hydroxyl groups, alcoholic hydroxyl groups were selectively acylated under neutral conditions, whereas, the opposite selectivity was observed under basic conditions, similar to the cases using acyl halides or acid anhydrides. Although 1 and 3 were unreactive to alcohols, 5-10 having substituent groups at C-4 were reactive to alcohols to give the corresponding acetates or benzoates.
Acetyl transfer reactions on AlPO4-Al2O3
Costa, Antonio,Riego, Juan Martin
, p. 2327 - 2328 (2007/10/02)
An efficient acetylation of alcohols and aliphatic amines promoted by the AlPO4-Al2O3/ethyl acetate system is described.The solid catalist acts, at least in part, as the acetyl carrier.
