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
The present disclosure is generally directed to antiviral compounds, and more specifically directed to combinations of compounds which can inhibit the function of the NS5A protein encoded by Hepatitis C virus (HCV), compositions comprising such combinations, and methods for inhibiting the function of the NS5A protein.
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.
PRODRUGS OF NH-ACIDIC COMPOUNDS: ESTER, CARBONATE, CARBAMATE AND PHOSPHONATE DERIVATIVES
申请人:Blumberg Laura Cook
公开号:US20110319422A1
公开(公告)日:2011-12-29
The invention provides a method of sustained delivery of a lactam, imide, amide, sulfonamide, carbamate or urea containing parent drug by administering to a patient an effective amount of a prodrug compound of the invention wherein upon administration to the patient, release of the parent drug from the prodrug is sustained release. Prodrug compounds suitable for use in the methods of the invention are labile conjugates of parent drugs that are derivatized through carbonyl linked prodrug moieties. The prodrug compounds of the invention can be used to treat any condition for which the lactam, imide, amide, sulfonamide, carbamate or urea containing parent drug is useful as a treatment.