3452-28-6

Upstream product

• 120-80-9 benzene-1,2-diol 
• 91-16-7 1,2-dimethoxybenzene 
• 150699-37-9 2,3-bis(4-methoxyphenyl)-2,3-bis(trimethylsiloxy)butane 
• 3452-29-7 2,2-di(3,4-dimethoxyphenyl)propionic acid 
• 105-53-3 diethyl malonate 

Relevant academic research and scientific papers

Acid catalysis vs. electron-transfer catalysis via organic cations or cation-radicals as the reactive intermediate. Are these distinctive mechanisms?

Proton transfer to aromatic and olefinic donors (D) leads to the facile interchange of transient carbocations (DH+) and cation-radical (D+.). The same types of cation and cation-radical are reactive intermediates in the acid catalysis and the electron-transfer catalysis of such organic transformations as benzylic coupling, epoxide/pinacol rearrangements and cis-trans isomerization of stilbenes when they are both carried out under otherwise identical reaction conditions. However, the rapid exchange of diamagnetic cations and paramagnetic cation-radicals blurs the traditional view of separate electrophilic and homolytic processes, and rigorous experimental evidence is required to establish whether acid catalysis and electron-transfer catalysis actually represent distinct mechanistic categories. Acta Chemica Scandinavica 1998.