AbstractAn efficient method for the acetylation of a wide range of alcohols as well as phenols with acetic anhydride in good to excellent yields undersolvent-freeconditions, using zinc zirconium phosphate as the catalyst was investigated. The catalyst was characterized by XRD, inductivity coupled plasma-optical emission spectroscopy, and scanning electron microscope. Products are easily isolated
Phosphomolybdic Acid: Mild and Efficient Catalyst for Acetylation of Alcohols, Phenols, and Amines under Solvent-Free Conditions
作者:Sung Kim、Santosh Kadam
DOI:10.1055/s-2007-1000859
日期:2008.1
simple and efficient catalyst for the acetylation of alcohols, phenols, and amines. Acetylation reactions with aceticanhydride (1.0 equiv) proceed in excellent yield in the presence of a catalytic amount (0.2 mol%) of PMA at ambient temperature within a relatively short reaction time (<10 min). Structurally diverse alcohols, phenols, and amines undergo acetylationunder solvent-free conditions.
Die Reduktion von β-Benzoyl-propionsäuren aus der Reihe des Resorcins
作者:F. Zymalkowski、J. Gelberg
DOI:10.1002/ardp.19662990614
日期:——
mit NaBH4 bis zur Stufe der Hydroxysaure reduzieren. Die Ursachen werden diskutiert. Die elektrolytische Reduktionvon Succinoylphenolen an einer Bleikathode liefert neben γ-Aryl-γ-hydroxybuttersauren deren pinacolartige Dimerisate, die durch Protonenkatalyse lactonisiert werden. 4-Methoxyphenyl-butyrolacton kann mit BBr3 entmethyliert werden. Die Reaktion last sich nicht auf 4-Methoxy-2-hydroxyphenyl-butyrolacton
Thallium(III) Chloride: A Mild
and Efficient Catalyst for Acylation of Alcohols, Phenols
and Thiols, and for Geminal Diacylation of Aldehydes under
Solvent-Free Conditions
作者:Sung Kim、Santosh Kadam
DOI:10.1055/s-0028-1083148
日期:——
simple and efficientcatalyst for acylation of alcohols, phenols and thiols. It is also very effective for geminal diacylation of aldehydes. The acylation reaction using acetic anhydride proceeds in excellent yield in the presence of catalytic amounts ofthallium(III) chloride (1 mol%) at room temperature within relatively short reaction times (<20 min). Structurally diverse alcohols, phenols, thiols and
A compound selected from the group consisting of all possible isomeric forms, racemic or optically active of a compound of the formula ##STR1## wherein the substituents are defined in the specification, and their non-toxic, pharmaceutically acceptable acid addition salts having antiarhythmic activity.