نتایج جستجو برای: nucleophilic substitution reactions
تعداد نتایج: 222918 فیلتر نتایج به سال:
A mechanistic study of arylations of aliphatic alcohols and hydroxide with diaryliodonium salts, to give alkyl aryl ethers and diaryl ethers, has been performed using experimental techniques and DFT calculations. Aryne intermediates have been trapped, and additives to avoid by-product formation originating from arynes have been found. An alcohol oxidation pathway was observed in parallel to ary...
In this article, we consider cross-validation of the quantitative structure-property relationship models for reactions and show that conventional k-fold (CV) procedure gives an ‘optimistically’ biased assessment prediction performance. To address issue, suggest two strategies model cross-validation, ‘transformation-out’ CV, ‘solvent-out’ CV. Unlike approach does not nature objects, proposed pro...
The facile and high yield synthesis of a new series of dibenzophenones in the presence of polyphosphoric acid (PPA) together with their cyclization to corresponding moni and dixanthones are described. The aromatic nucleophilic substitution of these new compounds are also studied.
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