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.
Acetonyltriphenylphosphonium Bromide (ATPB): A Versatile Reagent for the Acylation of Alcohols, Phenols, Thiols and Amines and for 1,1-Diacylation of Aldehydes under Solvent-Free Conditions
作者:Abu T. Khan、Lokman H. Choudhury、Subrata Ghosh
DOI:10.1002/ejoc.200500066
日期:2005.7
A wide variety of alcohols, phenols, amines and thiols may easily be converted into the corresponding acetate derivatives by treatment with acetic anhydride (1.5–2.0 equivalents) in the presence of acetonyltriphenylphosphonium bromide (ATPB; 5 mol %) in good yields at room temperature. With the same precatalyst, both aliphatic and aromatic aldehydes can also be transformed into the corresponding gem-diacetates
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.
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.
Poly(4-vinylpyridinium) perchlorate as an efficient solid acid catalyst for the chemoselective preparation of 1,1-diacetates from aldehydes under solvent-free conditions
作者:Nader Ghaffari Khaligh
DOI:10.1016/s1872-2067(12)60750-5
日期:2014.3
Abstract Poly(4-vinylpyridinium) perchlorate has been used as a supported, recyclable, environmentally-benign catalyst for the formation of acylals from aliphatic and aromatic aldehydes in good to excellent yields under solvent-free conditions. Notably, the reaction conditions were tolerant of ketones. This methodology offers several distinct advantages, including its operational simplicity and high