Fluoroboric acid adsorbed on silica gel as a new and efficient catalyst for acylation of phenols, thiols, alcohols, and amines
作者:Asit K. Chakraborti、Rajesh Gulhane
DOI:10.1016/s0040-4039(03)00683-x
日期:2003.4
Fluoroboric acid supported on silica gel efficiently catalyzes acylation of structurally diverse phenols, alcohols, thiols, and amines undersolventfree conditions. Acid-sensitive alcohols are smoothly acylated without competitive side reactions.
RECYCLABLE CATALYSTS FOR ESTERIFICATION OR ACYLATION OF ALCOHOLS
申请人:LU NORMAN
公开号:US20120184748A1
公开(公告)日:2012-07-19
A compound is useful as a recyclable catalyst for esterification or acylation of alcohols and consists of saccharine and a compound comprising a pyridine moiety. In addition, also a method of preparing the compound and an ester synthesis method using the compound are introduced.
Pyridinium saccharinate salts as efficient recyclable acylation catalyst: a new bridge between heterogeneous and homogeneous catalysis
作者:Norman Lu、Wei-Hsuan Chang、Rong-Jyun Wei、Yung-Cheng Fang、Tu-Wen Han、Guo-Quan Wang、Jia-Yaw Chang、Yuh-Sheng Wen、Ling-Kang Liu
DOI:10.1016/j.tet.2016.04.073
日期:2016.6
The homogeneous nature of DMAP-catalyzed acylation still suffers from the problems of catalyst separation and/or residual DMAP contamination. DMAP causes acute dermal toxicity, whereas the corresponding DMAP salt exhibits only slight irritation to the skin. Very recently, we found that the DMAP saccharinate salt is also great recyclablecatalyst, whose acylation of alcohols has been successfully and effectively
catalytic condensation of carboxylic acids with equimolar amounts of alcohols is the most desirable. Although several highly active dehydration catalysts have been reported, more efficient alternatives are still strongly needed because the dehydrative esterification of tertiary alcohols, phenols, acid-sensitive alcohols, amino acids, and hardly soluble alcohols has never proceeded satisfactorily. Here
A salt made of 4-N,N-dimethylaminopyridine (DMAP) and saccharin as an efficient recyclable acylation catalyst: a new bridge between heterogeneous and homogeneous catalysis
作者:Norman Lu、Wei-Hsuan Chang、Wen-Han Tu、Chieh-Keng Li
DOI:10.1039/c1cc11556a
日期:——
Here, we report insights into the new recyclablecatalyst 1, (DMAP.saccharin). The DMAP.saccharin-catalysed acylation of alcohols has been successfully carried out more than 8 times. Only 1 mol% of catalyst 1 efficiently promotes acylation with almost equimolar amounts of acid anhydrides, under both base-free and solvent-free conditions.