An Efficient and Practical Procedure for Synthesis of 1,1‐Diacetates from Aldehydes Catalyzed by Zirconium Sulfate Tetrahydrate–Silica Gel
作者:Tongshou Jin、Guoliang Feng、Mina Yang、Tongshuang Li
DOI:10.1081/scc-120030752
日期:2004.12.31
Abstract A facile and efficient procedure for synthesis of 1,1‐diacetatesfrom aldehydes with acetic anhydride was described using zirconium sulfate tetrahydrate–silica gel as catalyst in excellent yields under mild reaction conditions.
Mild and Chemoselective Synthesis and Deprotection of Geminal Diacetates Catalyzed by Titanium(IV) Halides
作者:Jae-Sang Ryu、Misuk Jung、Jieun Yoon、Hak Kim
DOI:10.1055/s-0029-1218849
日期:2010.8
A novel, mild, and chemoselective method was developed for the preparation of gem-diacetates from aldehydes and acetic anhydride in the presence of titanium(IV) fluoride (1-5 mol%) under solvent-free conditions at room temperature. The reaction showed a high chemoselectivity toward aldehydes in the presence of ketones. Moreover, titanium(IV) fluoride also catalyzed the deprotection of gem-diacetates
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
Indium Tribromide as a Highly Efficient and Versatile Catalyst for Chemoselective Synthesis of Acylals from Aldehydes under Solvent-Free Conditions
作者:Yong-Mei Wang、Liang Yin、Zhan-Hui Zhang、Mei-Li Pang
DOI:10.1055/s-2004-829549
日期:——
A mild and efficient method has been developed for the chemoselective preparation of acylals from aldehydes in the presence of catalytic amounts (0.01-1.0 mol%) of InBr3 under solvent-free conditions in very good to excellent yields.
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