Transition metal-free oxidation of benzylic alcohols to carbonyl compounds by hydrogen peroxide in the presence of acidic silica gel
, Available Online November
Hossein Ghafuri PDF (230 K)
Abstract: Oxidation of alcohols to carbonyl compounds has become an important issue in the process industry as well as many other applications. In this method, various benzylic alcohols were successfully converted to corresponding aldehydes and ketones under transition metal-free condition using hydrogen peroxide in the presence of some amount of catalytic acidic silica gel. Silica gel is inexpensive and available. One of the most important features of this method is its short reaction time.
Keywords: Oxidation, Carbonyl compounds, Hydrogen peroxide, Acidic silica gel
An experimental and quantumchemical study of [2+3] cycloaddition between (Z)-C-(m,m,p-trimethoxyphenyl)-N-(p-methyphenyl)-nitrone and (E)-3,3,3-trichloro-1-nitroprop-1-ene: mechanistic aspects
, Available Online October
Alicja Szczepanek, Ewa Jasińska, Agnieszka Kącka and Radomir Jasiński PDF (230 K)
Abstract: Analysis of addent interactions with respect to the theory of electrophilicity and nucleophilicity indexes and kinetic studies shows the polar nature of [2+3] cycloaddition of (Z)-C-(m,m,p-trimethoxyphenyl)-N-(p-methylphenyl)-nitrone to (E)-3,3,3-trichloro-1-nitroprop-1-ene. However, PES exploration results do not confirm any zwitterion on the reaction paths. On the other hand, the nature of the solvent effect and the experimentally determined activation parameter values do not exclude a scenario in which one-step and stepwise processes occur simultaneously.
Keywords: Nitrone, Nitroalkene [2+3], Cycloaddition, Kinetic, Mechanism, DFT calculations
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