the presence of manganese(III) acetate gives naphthalenecarbaldehydes and naphthalenecarboxylic acids. Similar reactions of anthracene, pyrene, and methoxybenzenes also yield formylated and carboxylated products. It was found that the formyl group introduced to the aromatic ring was not derived from carboxymethyl radical generated directly by the thermolysis of manganese(III) acetate, but from a dicarboxymethyl
We report Pd-catalyzed ortho-C–H methoxylation and chlorination of benzaldehydes by employing monodentate transient directing groups (TDGs) as an alternative strategy to bidentate TDGs. More importantly, a single crystal of benzaldehyde imine ortho-cyclopalladium intermediate was successfully obtained, and its structure was unambiguously determined by X-ray diffraction, which clearly showed that it
Self Cycloaddition of
<i>o</i>
‐Naphthoquinone Nitrosomethide to (±)
<i>Spiro</i>
{naphthalene(naphthopyranofurazan)}‐one Oxide: An Insight into its Formation
作者:Demeter Tzeli、Ioannis E. Gerontitis、Ioannis D. Petsalakis、Petros G. Tsoungas、George Varvounis
DOI:10.1002/cplu.202200313
日期:2022.12
indicating its predominance over the intramolecular cyclization of −37.6 kcal/mol. 8-methoxy substituted oxime is sterically guided to 9-methoxynaphtho[1,2-d] instead of spiro adduct resulting to the formation of the isoxazole structure.