Syntheses of All Isomers of Naphthalenetricarboxylic Acids
作者:Yasuhiko Dozen
DOI:10.1246/bcsj.45.519
日期:1972.2
isomers of naphthalenetricarboxylic acids have been synthesized by the oxidation of trimethylnaphthalenes, dimethylacetonaphthones, dimethylnaphthoic acids, methylnaphthalenedicarboxylic acids, β-(dimethylnaphthoyl)propionicacid, or β-(acenaphthoyl)propionicacids with aqueous sodium bichromate or potassium ferricyanide. Most of these naphthalenetricarboxylic acids, acid anhydrides, and trimethyl esters
A new paradigm in the coupling of external alkenes with internal electron-deficientalkenes has been investigated in which an unprecedented annulation of vinylarenes on maleimides takes place. The reaction is carried out via a tandem in situ activation of both olefinic and aromatic C–H bonds of styrenes driving the reaction in a pseudo-Diels–Alder mode.
The first Diels–Alderreaction of vinyl arenes with ene systems catalyzed by MOFs is reported. Maleimides and maleicanhydride were annulated/dehydrogenated on styrenes in the presence of a mixed-metal (FeNi)MIL-88A catalyst. Neither an additional oxidant nor a source of halogen is needed to drive this oxidative [4 + 2] cyclization reaction. Kinetic evidence such as activation entropy corroborates