A Facile and Efficient Conversion of Aldehydes into 1,1-Diacetates (Acylals) using Iron(III) Fluoride as a Novel Catalyst
作者:V. T. Kamble、R. A. Tayade、B. S. Davane、K. R. Kadam
DOI:10.1071/ch06166
日期:——
Aldehydes are smoothly converted into the corresponding 1,1-diacetates (acylals) in high yields in the presence of a catalytic amount (0.1 mol-%) of iron(III) fluoride at room temperature. The noteworthy features of the present system are shorter reaction times, chemoselective protection of aldehydes, and solvent-free conditions. The procedure is especially useful for large-scale syntheses as the catalyst
Copper(II) Tetrafluoroborate-Catalyzed Formation of Aldehyde-1,1-diacetates<sup />
作者:Asit K. Chakraborti、Ramasamy Thilagavathi、Raj Kumar
DOI:10.1055/s-2004-816000
日期:——
Aldehyde 1,1-diacetates are formed in excellent yields from aldehydes and acetic anhydride under solvent-free conditions at room temperature in short times in the presence of a catalytic amount of copper(II) tetrafluoroborate hydrate.
An efficient method for the synthesis of acylals from aldehydes using silica-supported perchloric acid (HClO4–SiO2)
作者:Vinod T. Kamble、Vasant S. Jamode、Neeta S. Joshi、Ankush V. Biradar、Rameshchandra Y. Deshmukh
DOI:10.1016/j.tetlet.2006.05.125
日期:2006.7
The synthesis of acylals from structurally diverse aldehydes has been performed in excellent yields under solvent-free conditions using HClO4–SiO2 as a mild, convenient, reusable, and heterogeneous catalyst. The procedure is operationally simple, environmentally benign and has the advantage of enhanced atom utilization. Furthermore, the catalyst can be recovered simply and reused efficiently a number
A NOVEL AND EFFICIENT CONVERSION OF ALDEHYDES TO 1,1-DIACETATES CATALYZED WITH FeCl<sub>3</sub>/SiO<sub>2</sub>UNDER MICROWAVE IRRADIATION
作者:Cunde Wang、Minghua Li
DOI:10.1081/scc-120014779
日期:2002.1
ABSTRACT 1,1-Diacetates (3) are effectively synthesized in few minutes by acylation reaction of aldehydes with acetic anhydride in the presence of FeCl3/SiO2 under microwave irradiation.
Zinc Tetrafluoroborate-Catalyzed Efficient Conversion of Aldehydes to Geminal Diacetates and Cyanoacetates
作者:Brindaban C. Ranu、Jyotirmoy Dutta、Arijit Das
DOI:10.1246/cl.2003.366
日期:2003.4
A trace of an aqueous solution of zinc tetrafluoroborate was demonstrated to catalyze the conversion of an aldehyde to its 1,1-diacetate by acetic anhydride without any solvent. A similar reaction of an aldehyde with a mixture of potassium cyanide and acetic anhydride in methylene chloride was also catalyzed by Zn(BF4)2 to provide the corresponding geminal cyanoacetate.