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.
P<sub>2</sub>O<sub>5</sub>/Al<sub>2</sub>O<sub>3</sub>as an Efficient Heterogeneous Catalyst for the Acetylation of Alcohols, Phenols, Thiols, and Amines Under Solvent-Free Conditions
作者:Amin Zarei、Abdol R. Hajipour、Leila Khazdooz
DOI:10.1080/00397911.2010.492197
日期:2011.5.4
Abstract A convenient, rapid, and efficient method for the acetylation of alcohols, phenols, thiols, and amines has been developed by using aceticanhydride in the presence of a catalytic amount of P2O5 /Al2O3 under solvent-free conditions at room temperature. This reaction was studied under different conditions, and several solvents were examined for this conversion. However, in terms of reaction
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.
Montmorillonite Clay Catalysis. Part 4.1 An Efficient and Convenient Procedure for Preparation of 1,1-Diacetates from Aldehydes
作者:Zhan-Hui Zhang、Tong-Shuang Li、Cheng-Guang Fu
DOI:10.1039/a608318h
日期:——
An easy preparation of 1,1-diacetates from
aldehydes with montmorillonite clays as catalysts has been
carried out in excellent yield.
使用蒙脱石粘土作为催化剂,从醛类中高效地制备了1,1-二乙酸酯,产率极佳。
A practical and efficient procedure for the cleavage of acylals to aldehydes catalyzed by indium tribromide in water
作者:Zhan-Hui Zhang、Liang Yin、Yi Li、Yong-Mei Wang
DOI:10.1016/j.tetlet.2004.11.161
日期:2005.1
Indium tribromide (10 mol %) is an efficient catalyst for chemoselective cleavage of aryl acylals in refluxing water. A variety of acylals have been deprotected to give the corresponding parent aldehydes in high yield. The procedure presented is operationally simple, practical, and compatible with other sensitive functionalities such as methoxy, methyleneioxy, and benzyloxy groups present in the substrates