2,2,6,6-Tetramethylpiperidinium triflate (TMPT): a highly selective and self-separated catalyst for esterification
作者:Lan Gao、Taoping Liu、Xiaochun Tao、Yongmin Huang
DOI:10.1016/j.tetlet.2016.09.061
日期:2016.11
An eco-friendly and readily accessible 2,2,6,6-tetramethylpiperidinium triflate was found as highly-selective and self-separated catalyst for esterification under solvent-free condition. The X-ray crystallography revealed that it formed a ‘hydrophobic wall’ which could effectively eliminate the generated water from the reactive sites. Moreover, it could precipitate from the reaction system with excellent
[EN] SUBSTITUTED PYRIDONES AS INHIBITORS OF POLY(ADP-RIBOSE) POLYMERASE (PARP)<br/>[FR] PYRIDONES SUBSTITUES INHIBITEURS DE LA POLY(ADP-RIBOSE) POLYMERASE (PARP)
申请人:AVENTIS PHARMA INC
公开号:WO2005097750A1
公开(公告)日:2005-10-20
The present invention discloses and claims a series of 2,3,5-substituted pyridone derivatives as defined herein. This invention also relates to methods of making these compounds. The compounds of this invention are inhibitors of poly(adenosine 5'-diphosphate ribose) polymerase (PARP) and are therefore useful as pharmaceutical agents, especially in the treatment and/or prevention of a variety of diseases, including diseases associated with the central nervous system and cardiovascular disorders.
Development and Applications of Transesterification Reactions Catalyzed by N-Heterocyclic Olefins
作者:Marcus Blümel、Janina-Miriam Noy、Dieter Enders、Martina H. Stenzel、Thanh V. Nguyen
DOI:10.1021/acs.orglett.6b00835
日期:2016.5.6
A novel method to utilize N-heterocyclic olefins (NHOs), the alkylidene derivatives of N-heterocycic carbenes, as organocatalysts to promote transesterification reactions has been developed. Because of their strong Brønsted/Lewis basicity, NHOs can enhance the nucleophilicity of alcohols for their acylation reactions with carboxylic esters. This transformation can be employed in industrially relevant
The carbon material functionalized with NH<sub>2</sub><sup>+</sup> and SO<sub>3</sub>H groups catalyzed esterification with high activity and selectivity
作者:Shaoqi Zhan、Xiaochun Tao、Liangzhen Cai、Xiaohui Liu、Taoping Liu
DOI:10.1039/c4gc01395f
日期:——
A novel carbon material was prepared conveniently, which can catalyze the esterification reaction with high reactivity and selectivity.
一个新型碳材料被方便地制备出来,可以催化酯化反应,具有高反应活性和选择性。
Mild Esterification and Transesterification of Carboxylic Acids Catalyzed by Tetracyanoethylene and Dicyanoketene Dimethyl Acetal
作者:Yukio Masaki、Nobuyuki Tanaka、Tsuyoshi Miura
DOI:10.1246/cl.1997.55
日期:1997.1
A π-acid tetracyanoethylene (TCNE) and its derivative dicyanoketene dimethyl acetal (DCKDMA) were found to catalyze esterification of lauric acid with various types of alcohols. This mathod was successfully applied to methyl esterification of a variety of carboxylic acids including aromatic, α,β-unsaturated, α-hydroxy, and N-Cbz and N-Boc-protected α-amino acids without racemization at the range from