Silica Sulfuric Acid and Al(HSO<sub>4</sub>)<sub>3</sub>: As Efficient Catalysts for the Formylation of Alcohols by Using Ethyl Formate under Heterogeneous Conditions
作者:Mohammad Ali Zolfigol、Gholamabbas Chehardoli、Mina Dehghanian、Khodabakhsh Niknam、Farhad Shirini、Ahmad Khoramabadi-Zad
DOI:10.1002/jccs.200800132
日期:2008.8
A mixture of ethyl formate and a catalytic amount of silica sulfuricacid or Al(HSO 4 ) 3 as suitable formylating systems can formylate various alcohols to their corresponding formate ester derivatives under mild, nearly neutral and heterogeneous conditions at room temperature with good to excellent yields.
<i>N,N′</i>-Dibromo-<i>N,N′</i>–1,2-ethanediylbis(benzene sulfonamide) as an Efficient Catalyst for Acetylation and Formylation of Alcohols Under Mild Conditions
An efficient method for the acylation and formylation of alcohols and phenols by using an acylating/formylating agent (acetic anhydride and formic acid) in the presence of a catalytic amount of N,N′-dibromo-N,N′–1,2-ethanediylbis(benzene sulfonamide) under mild and solvent-freeconditions at room temperature in good to excellent yields is described. The use of protic acids and metal Lewis acids is
Conversion of Alkyl Halides into Alcohols via Formyloxylation Reaction with DMF Catalyzed by Silver Salts
作者:Antonio Abad、Consuelo Agulló、Ana C. Cuñat、Ismael Navarro
DOI:10.1055/s-2005-918453
日期:——
transformation of alkyl halides into alcohols via a two-step process based on the reaction with DMF catalyzed by Ag(I) salts followed by acid or basic hydrolysis of the intermediate formate ester has been evaluated. The results show that a large variety of primary and some secondary alkyl halides can be transformed efficiently into the corresponding alcohols, making this alkyl halide to alcohol interconversion
Preparation of Alkyl Formates from Corresponding Alcohols using Ethyl Formate Catalyzed by Poly(4-vinylpyridinium tribromide) under Neutral and Solvent-Free Conditions
作者:Arash Ghorbani-Choghamarani、Masoomeh Norouzi
DOI:10.5012/bkcs.2011.32.4.1399
日期:2011.4.20
E-mail: arashghch58@yahoo.com; a.ghorbani@mail.ilam.ac.ir Received January 15, 2011, Accepted February 21, 2011Key Words : Alcohols, Alkyl formate, Formylation, Poly(4-vinylpyridinium tribromide), Ethyl formateThe introduction and development of heterogeneouscatalysts for fine chemical synthesis has become a majorarea of research.
Visible-light-mediated conversion of alcohols to halides
作者:Chunhui Dai、Jagan M. R. Narayanam、Corey R. J. Stephenson
DOI:10.1038/nchem.949
日期:2011.2
development of new means of activating molecules and bonds for chemical reactions is a fundamental objective for chemists. In this regard, visible-light photoredox catalysis has emerged as a powerful technique for chemoselective activation of chemical bonds under mild reaction conditions. Here, we report a visible-light-mediated photocatalytic alcohol activation, which we use to convert alcohols to the corresponding