Reusable and efficient polyvinylpolypyrrolidone-supported triflic acid catalyst for acylation of alcohols, phenols, amines, and thiols under solvent-free conditions
prepared and fully characterized by FT-IR, TGA, and SEM. This super acidic solid catalyst shows high catalytic activity for selective acylation of alcohols, phenols, amines, and thiols with anhydrides undersolvent-freeconditions at room temperature. In addition, this method features an easy to handle solid super acid catalyst and an operationally simple procedure, affording the desired acylated products
Synthesis and characterization of MCM-41@XA@Ni(II) as versatile and heterogeneous catalyst for efficient oxidation of sulfides and acetylation of alcohols under solvent-free conditions
strategy. The structure of the catalyst was characterized by X-ray diffraction. The thermal property of the as-synthesized materials was studied using thermogravimetric-differential thermal analysis. The average particles size and morphology of MCM-41@XA@Ni(II) were investigated using scanning electron microscopy and transmission electron microscopy. This nanostructure catalyst was effective for the selective
本文中,通过简便的顺序策略设计并合成了固定在改性介孔二氧化硅MCM-41上的Ni(II)。催化剂的结构通过X射线衍射表征。使用热重差热分析研究了合成后材料的热性能。使用扫描电子显微镜和透射电子显微镜研究了MCM-41 @ XA @ Ni(II)的平均粒径和形态。这种纳米结构催化剂在无溶剂条件下对硫化物的选择性氧化和醇的乙酰化有效。催化剂的易回收性及其在硫化物氧化中对底物硫基团的完全化学选择性是该催化剂的重要“绿色”特性。
Polyvinylpolypyrrolidone-bound boron trifluoride: A highly efficient catalyst for acylation of alcohols, phenols and trimethylsilyl ethers by acetic anhydride
Abstract A highly efficient method for the acylation of alcohols, phenols and trimethylsilyl ethers with acetic anhydride is described using polyvinylpolypyrrolidone-bound boron trifluoride (PVPP-BF 3 ) under mild and heterogeneous conditions at room temperature in good to excellent yields. The polyvinylpolypyrrolidone-boron trifluoride complex shows more water tolerant, non-corrosive and stable solid
CHEMOSELECTIVE ACETYLATION OF ALCOHOLS, AMINES, AND THIOLS WITHOUT CATALYST AND SOLVENT
作者:B. P. Bandgar、S. P. Kasture、V. T. Kamble
DOI:10.1081/scc-100104824
日期:2001.1
Microwave induced rapid and selective acetylation of alcohols, amines and thiols with aceticanhydride was carried out under non-catalytic and solvent free conditions.
Sol–gel derived LaFeO3/SiO2 nanocomposite: synthesis, characterization and its application as a new, green and recoverable heterogeneous catalyst for the efficient acetylation of amines, alcohols and phenols
作者:Saeed Farhadi、Kosar Jahanara、Asma Sepahdar
DOI:10.1007/s13738-013-0377-3
日期:2014.8
measurements and was used as a heterogeneous catalyst for the efficientacetylation of amines, alcohols and phenols to the corresponding acetates using aceticanhydrideunder solvent-free conditions. Among the various substrates, acetylation of amines was preceded rapidly, so that an amine group could be selectively acetylated in the presence of alcoholic or phenolic hydroxyl groups by the appropriate