## Abstract Silica phenyl sulfonic acid (SPSA) was prepared and effectively used in the one‐pot synthesis of 2‐aryl‐1‐arylmethyl‐1H‐1,3‐benzimidazoles from __o__‐phenylenediamine with aldehydes in water in the presence of tetrabutyl ammonium bromide with good to high yield. Also, SPSA was used as a
✦ LIBER ✦
On the Stability of Selected Monomeric and Polymeric Aryl Sulfonic Acids on Heating in Water (Part 1)
✍ Scribed by C. Vogel; J. Meier-Haack; A. Taeger; D. Lehmann
- Publisher
- John Wiley and Sons
- Year
- 2004
- Tongue
- English
- Weight
- 343 KB
- Volume
- 4
- Category
- Article
- ISSN
- 1615-6846
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✦ Synopsis
Abstract
A number of low molecular weight sulfonated aromatic compounds: carboxamides, imides, sulfonamides, as well as sulfonated polymers; aramides and poly(styrene‐p‐sulfonic acid), were tested for their stability on heating in water and dilute acid to temperatures ranging from 130–200 °C. Desulfonation was observed with some compounds. Sulfonamide linkages were found to be stable, while carboxamide linkages and phthalimides were not.
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