Chemistry Journals Online-Lupine Publishers

Two Step Conversion of Ferulic Acid to Vinyl Phenol by Meena Krishania in Archives of Organic and Inorganic Chemical Sciences in Lupine Publishers

The cereal industries produce several million tons of cereal brans every year which are good source of ferulic acid. There was no such chemical route to convert ferulic to vinyl phenol directly. Therefore, an alternative approach two step conversion of ferulic acid to vinyl phenol was developed for better and costly flavour by using chemical route to make it cost effective.

https://www.lupinepublishers.com/chemistry-journal/fulltext/two-step-conversion-of-ferulic-acid-to-vinyl-phenol.ID.000130.php#Methodology%20of%20Two%20Step%20Conversion%20of%20Ferulic%20Acid%20to%20Vinyl%20Phenol

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Chemistry Journals-Lupine Publishers

Influence of the Cr Content on the Corrosion Properties of a Series of Binary Cobalt-Chromium Alloys in Acidic Artificial Saliva by Estelle Kretz in Archives of Organic and Inorganic Chemical Sciences in Lupine Publishers

Cobalt-based alloys are more and more considered for dental applications, instead the expensive noble alloys and the other predominantly based alloys based on the allergen element nickel. These alloys frequently contain chromium to allow good resistance against corrosion as this may take place in the buccal milieu. The most often chromium is present in high quantity, close to 30wt. %, but it is maybe possible to decrease a little its contents without losing corrosion resistance. The aim of this study is exploring how the corrosion behavior of a cobalt alloy may vary versus its chromium content. In order to simplify this investigation only Co- xCrbinary alloys were considered, with x decreasing from 30 to 0wt.% by slices of 5wt.%. A series of seven alloys was synthesized by foundry under inert atmosphere and their behavior in corrosion in an artificial saliva of simple composition (NaCl 9g/L) acidified to pH=2.3 was specified using various classical electrochemical techniques (open circuit potential follow-up, Stern-Geary, Tafel, cyclic polarization). It appeared that passivation of the alloys occurred during the first two hours of immersion when the chromium content was 10 wt. % or higher, with as result high corrosion potentials and low corrosion current densities.

https://www.lupinepublishers.com/chemistry-journal/fulltext/influence-of-the-cr-content-on-the-corrosion-properties-of-a-series-of-binary-cobalt-chromium-alloys-in-acidic-artificial-saliva.ID.000128.php

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Camphor Sulfonic Acid Catalyzed Facile and Atom Economical Access to Highly Substituted Piperidines via One Pot Multi Component Reactions (AOICS)- Lupine Publishers

Camphor Sulfonic Acid Catalyzed Facile and Atom Economical Access to Highly Substituted Piperidines via One Pot Multi Component Reactions (AOICS)- Lupine Publishers

A simple and efficient protocol has been developed for the synthesis of highly substituted Piperidines derivatives. This strategy demonstrated five component reactions of two equivalents of aldehydes, two equivalents of anilines and (3-keto esters in ethanol using 10 mol% of camphor sulfonic acid at reflux. The significant features of the present protocol include excellent yield, shorter reaction time, and easy work up procedure, broad substrate scope, high atom economy and formation of C-C and C-N bond in a single step operation.

https://www.lupinepublishers.com/chemistry-journal/fulltext/camphor-sulfonic-acid-catalyzed-facile-and-atom-economical-access-to-highly-substituted-piperidines-via-one-pot-multi-component-reactions.ID.000113.php

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