Transition-Metal-Free Poly(thiazolium) Iodide/1,8-Diazabicyclo[5.4.0]undec-7-ene/Phenazine-Catalyzed Esterification of Aldehydes with Alcohols
作者:Supill Chun、Young Keun Chung
DOI:10.1021/acs.orglett.7b01617
日期:2017.7.21
Poly(3,4-dimethyl-5-vinylthiazolium) iodide was used as a polymer precatalyst in the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU) and phenazine for the oxidative esterification of aldehydes with alcohols. Selective functionalization of OH groups was achieved in the presence of NH2 groups. The poly(thiazolium) iodide/DBU/phenazine system exhibited excellent catalytic activity and could be reused
Iron Perchlorate on Silica Gel as Multi-purpose Reagent for Catalysis of Closure and Rupture of Carbon-Oxygen Bond in Epoxides, Alcohols, and Esters
作者:P. Salechi、M. M. Khodaei、S. B. Ghareghani、A. R. Motlagh
DOI:10.1023/b:rujo.0000003154.92028.84
日期:2003.6
Aliphatic alcohols and water in the presence of catalytic amounts of Fe3+ ion introduced as iron(Ill) perchlorate on silica gel carrier perform efficient regiospecific opening of an epoxy ring. Carbon acids esterification with various type alcohols was carried out using the system Fe(ClO4)(3)-silica gel in dichloromethane under conditions excluding solvolysis. Acetylation and formylation of alcohols was performed by efficient transesterification with ethyl acetate and ethyl formate.
Rhodium‐Catalyzed Reductive Esterification Using Carbon Monoxide as a Reducing Agent
作者:Vladimir S. Ostrovskii、Sofiya A. Runikhina、Oleg I. Afanasyev、Denis Chusov
DOI:10.1002/ejoc.202000438
日期:2020.7.23
A rhodium‐catalyzed reductiveesterification of carboxylicacids with carbonyl compounds was developed. This protocol fits a variety of carboxylicacids and aldehydes, opening the short way from industrial bulk compounds to valuable esters.