نتایج جستجو برای: sulfonic acids
تعداد نتایج: 267190 فیلتر نتایج به سال:
A simple and efficient synthetic protocol has been developed for the synthesis of 3-substituted-2H-1,4-benzothiazines by using a novel sulfonic acid functionalized nano-γ-Al2O3 catalyst, devoid of corrosive acidic, and basic reagents. The developed method has the advantages of good to excellent yields, short reaction times, operational simplicity, and a recyclable catalyst. The catalyst can be ...
A stable monoprotonated porphyrin (porphyrin monoacid) was obtained by reaction of saddle-distorted dodecaphenylporphyrin with anthracene sulfonic acids and the crystal structures of the supramolecular assemblies were determined.
The issue of controlling genotoxic impurities in novel active pharmaceutical ingredients (APIs) is a significant challenge. Much of the current regulatory concern, has been focused on the formation and control of genotoxic sulfonate esters. This is linked with the withdrawal of Viracept (Nefinavir mesilate) from European markets in mid-2007, over concerns about elevated levels of ethyl methanes...
1. A study of the mode of combination which takes place between certain amino acids, proteins, various carboxylic acids, and certain sulfonic acids and manganous ions to form complexes is reported. 2. Three criteria for complex formation were used: (a) the equilibrium between the substance under test and manganous ions dissolved in aqueous buffered solution and isonitrosoacetophenone dissolved ...
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