Formamide Catalysis Facilitates the Transformation of Aldehydes into Geminal Dichlorides
作者:Peter Helmut Huy
DOI:10.1055/s-0037-1611798
日期:2019.6
Haack reagent type intermediate is likely to be essential for this organocatalytic nucleophilic substitution reaction. Herein, a novel method for the transformation of aldehydes into geminal dichlorides based on phthaloyl chloride as reagent and N-formylpyrrolidine as Lewis base catalyst is disclosed. Given the mild reaction conditions, the current protocol is distinguished by high levels of functional
The present invention provides crosslinked amine polymers effective for binding and removing bile salts from the gastrointestinal tract. These bile acid binding polymers or pharmaceutical compositions thereof can be administered to subjects to treat various conditions, including hypercholesteremia, diabetes, pruritus, irritable bowel syndrome-diarrhea (IBS-D), bile acid malabsorption, and the like.
Mechanism of Dichlorination of n-Dodecane and Chlorination of 1-Chlorododecane Adsorbed on ZSM-5 Zeolite Molecular Sieves. A Supramolecular Structural Interpretation
作者:Nicholas J. Turro、Nianhe Han、Xue-gong Lei、James R. Fehlner、Lloyd Abrams
DOI:10.1021/ja00122a020
日期:1995.5
-chlorododecane (1CD) adsorbed on two pentasilzeolites (silicalite and LZ- 105) have been investigated. The results are explained in terms of a supramolecular model for which the mobile and diffusing chlorination reagents (CWC12) enter the zeolite particle from the external surface and diffuse preferentially along the linear channels of the zeolite internal surface that contain immobile adsorbed nD (or 1CD)
Ti-Catalyzed Modular Ketone Synthesis from Carboxylic Derivatives and <i>gem</i>-Dihaloalkanes
作者:Jiabin Ni、Xiaowen Xia、Danyu Gu、Zhaobin Wang
DOI:10.1021/jacs.3c04009
日期:2023.7.12
Ketones are ubiquitous in organic synthesis. However, the general method to convert widely available carboxylic acids, unactivated esters, and amides into ketones remains elusive. Herein, we describe the Ti-catalyzed modular ketonesynthesisfrom carboxylic derivatives and easily accessed gem-dihaloalkanes. Notably, this protocol could achieve the direct catalytic olefination of carboxylic acids. This
An electrorheological fluid composition comprising a dispersion of disperse-phase particles formed of a sulfonated polymer possessing aromatic rings substituted with sulfonic acid groups in an electrically non-conducting oil which electrorheological fluid is characterized by the fact that the number of sulfonic acid groups in said sulfonated polymer forming said disperse-phase particles exceeds the number of aromatic rings present in said sulfonated polymer.